Constantly Overwhelmed and Anxious Lately? Why It Happens

Yes—and it's very likely hormonal, not a personal failing. Fluctuating oestrogen and progesterone during perimenopause directly disrupt the brain chemicals that regulate calm, which is why ordinary tasks and noises can suddenly feel unbearable. In my practice, this is one of the most common patterns I see in women over 40, and it is treatable once you understand what's driving it.

If you've typed some version of "anyone else feeling constantly overwhelmed and anxious lately" into a search bar at 11pm, I want you to know two things straight away. First: you are far from alone. Second: this feeling has a physiological explanation, and it isn't a character flaw or a sign that you're falling apart.

Over the past 20 years, I've sat across from hundreds of women who describe almost identical experiences—usually starting somewhere in their early to mid-40s. They tell me they used to be able to juggle a demanding job, a household, ageing parents and a social life without blinking. Now, a school WhatsApp thread or an unexpected phone call can send their heart racing. Something has changed, and it isn't willpower.

What's happening in your body

The hormone most people blame for perimenopausal mood changes is oestrogen, and it does play a role—oestrogen influences serotonin production and receptor sensitivity, so as it fluctuates, so does your baseline sense of wellbeing. But in my clinical experience, and in the research I rely on, oestrogen is only half the story. The part almost nobody talks about is progesterone.

Progesterone is often the first hormone to decline in perimenopause, sometimes years before oestrogen levels become erratic. This matters enormously because progesterone isn't just a reproductive hormone—it's a neurosteroid. Its metabolite, allopregnanolone, acts directly on GABA receptors in the brain, the same receptors targeted by anti-anxiety medications like Valium. GABA is your nervous system's primary braking system; it's what allows your brain to downshift after a stressful moment instead of staying revved. When progesterone drops, that braking system weakens. What I see time and again in the women I work with is that this progesterone gap—not oestrogen alone—is often the true driver of that "constantly overwhelmed" feeling, the sense that you have less capacity to absorb everyday stress than you used to.

There's a concept I find enormously helpful for explaining this to patients: the Window of Vulnerability. Your brain isn't necessarily more sensitive to low hormone levels—it's more sensitive to the fluctuation of hormones. This is why perimenopause often feels more turbulent than the post-menopausal years that follow, once hormone levels settle at a new, lower baseline. It's the unpredictable rise and fall, not the absolute number, that destabilises mood regulation.

Layer onto this the cortisol-hormone loop. Midlife tends to arrive with its own stressors—careers peaking, teenagers, ageing parents, financial pressure, the so-called "sandwich generation" squeeze. Chronic stress keeps cortisol elevated, and your body, under pressure, will preferentially use the raw materials it needs to make cortisol rather than sex hormones—a process sometimes called "pregnenolone steal." This creates a self-perpetuating cycle: stress lowers progesterone and oestrogen further, which increases anxiety, which increases stress, which raises cortisol again. It's HPA axis dysregulation in real time, and it's a major reason antidepressants alone often don't touch this kind of anxiety—because the root cause isn't a serotonin deficiency, it's a neuroendocrine system under siege. In fact, clinical guidelines state that antidepressants should not be used as first-line treatment for low mood associated with menopause, as there is no evidence they help hormonal psychological symptoms (source: https://themenopausecharity.org/information-and-support/symptoms/menopause-and-mental-health/).

I also want to name something I rarely see addressed directly: sensory overload. Many women in this phase describe feeling physically overstimulated—by noise, bright lights, even the sensation of clothing tags or a partner's touch. This isn't in your head. Falling GABA activity and a dysregulated HPA axis lower your nervous system's threshold for what it perceives as "too much," so ordinary sensory input starts registering as a threat. This is what I call the Overwhelmed Threshold: your allostatic load—the cumulative wear and tear of decades of stress—reaches its ceiling at precisely the moment your hormonal buffering system is being withdrawn. It's not that life suddenly got harder; it's that your capacity to absorb it has genuinely narrowed.

Finally, there's the loss-of-self piece, which I think deserves as much attention as the biochemistry. Women tell me they don't recognise their own reactions—snapping at a partner, crying over something minor, feeling rage bubble up out of nowhere. This existential fear—"who have I become?"—is real and valid, and it deserves acknowledgement, not just a symptom checklist. Understanding the biology behind it doesn't erase the disorientation, but it does help take away the shame.

Is it perimenopause or something else?

Anxiety in your 40s can have several roots, and they often overlap. A few markers that point toward perimenopause specifically:

• ✦New-onset anxiety with no prior history of anxiety or panic disorder, especially if it began alongside changes in your cycle (source: https://time.com/article/2026/07/09/the-menopause-conversation-still-has-one-major-blind-spot)
• ✦Anxiety that clusters with physical symptoms—racing heart, breathlessness, night sweats, or waking at 2–3am with sudden dread
• ✦Symptoms that fluctuate with your cycle rather than being constant
• ✦A short fuse or irritability that feels disproportionate to the actual trigger
• ✦Onset in your early-to-mid 40s, which is when perimenopause typically begins and when many women first notice anxiety interfering with daily life (source: https://www.goodrx.com/conditions/menopause/anxiety-during-menopause?srsltid=AfmBOoqsZlgyInbodze82hCyoSZ-ZMpGkOGd7P9ew_cdGn_yuNpLcZJC)

Things that suggest a broader picture worth exploring with a clinician: anxiety present since adolescence or young adulthood, a strong link to a specific life event or trauma, or symptoms that are constant regardless of cycle timing. These aren't mutually exclusive—many women have both a pre-existing tendency toward anxiety and a hormonal amplification of it in midlife.

What you can do about it

• ✦Get a proper hormone-informed assessment before accepting a psychiatric label. More than half of perimenopausal women report a significant increase in depressive symptoms and mood changes (source: https://themenopausecharity.org/information-and-support/symptoms/menopause-and-mental-health/), yet this remains a significant blind spot in standard medical diagnostics—many women are prescribed antidepressants without anyone asking about their cycle. Start by naming what's actually happening.
• ✦Consider magnesium, ideally glycinate or threonate forms, in the evening. Magnesium supports GABA function and helps calm an overactive nervous system; in my practice, it's often the single most impactful and best-tolerated first step for the 3am wake-ups.
• ✦Prioritise sleep hygiene as a non-negotiable, not a luxury. The 3am wake-up with a racing heart is a well-documented pattern where hormonal drops trigger cortisol spikes and racing thoughts—stabilising your sleep window helps regulate the cortisol awakening response over time.
• ✦Address the cortisol loop directly, not just the anxiety symptom. Because chronic stress depletes the same building blocks your body needs for sex hormones, reducing allostatic load—through boundaries, rest, and saying no—isn't indulgent; it's biochemically necessary.
• ✦Discuss HRT with a knowledgeable provider, not just as symptom relief but as nervous system support. I encourage women to think of HRT not simply as "replacing hormones" but as a tool to stabilise the neuroendocrine system so the fight-or-flight response isn't left permanently switched on. Timing and dosing need to be individualised, which is why a general practitioner unfamiliar with perimenopause may under- or over-prescribe.
• ✦Build in daily nervous-system downshifts—yoga, slow breathing, time outdoors. These practices work partly by supporting the same GABA pathways that progesterone once supported, giving your brain an alternative braking mechanism.
• ✦Track your symptoms against your cycle for two to three months. Patterns are powerful evidence—both for your own clarity and for any clinical conversation you have going forward.

If you're ready to understand your own pattern rather than guess at it, a structured assessment can help connect the dots between what you're feeling and what's happening hormonally.

Take the Quick SOM Assessment — 2 minutes → Take the Full SOM Assessment — 5 minutes →

Frequently Asked Questions

Why am I suddenly feeling so overwhelmed by small tasks in my 40s? This is typically the result of falling progesterone reducing GABA activity in the brain, combined with an accumulated allostatic load from years of stress. Your nervous system's capacity to buffer everyday demands genuinely narrows during this hormonal transition, which is why small tasks that once felt manageable now feel disproportionately heavy.

Can perimenopause cause anxiety if I have no history of mental health issues? Yes. Women with no prior history of anxiety are significantly more likely to report high levels of nervousness and racing heart symptoms during perimenopause (source: https://time.com/article/2026/07/09/the-menopause-conversation-still-has-one-major-blind-spot). This is a hormonal effect, not evidence of an underlying psychiatric condition you somehow missed.

Is it normal to wake up at 2 or 3 a.m. with a racing heart and sense of dread? It's extremely common in perimenopause. Hormonal drops overnight can trigger cortisol spikes that pull you out of sleep with a racing heart and racing thoughts. It's uncomfortable but recognised as a distinct symptom pattern, and it usually responds well to targeted lifestyle and hormonal support.

How do I tell the difference between clinical anxiety and perimenopause mood shifts? Look at timing and physical clustering: perimenopausal anxiety tends to be new-onset, fluctuate with your cycle, and pair with physical symptoms like heart racing or night sweats. Longstanding anxiety since youth, or anxiety unrelated to cycle timing, points more toward a separate or additional underlying condition worth discussing with a clinician.

Does HRT actually help with the feeling of being constantly on edge? For many women, yes—when dosed and timed correctly. I view HRT not just as replacing hormones but as stabilising the neuroendocrine system, helping switch the fight-or-flight response off. It requires individualised care, so working with a provider experienced in perimenopause matters.

Why is my fuse so short lately even when I'm not 'stressed'? A short fuse without obvious external stress usually reflects internal biochemical stress—falling progesterone weakening your brain's GABA "braking system," combined with cortisol dysregulation. Your reaction isn't disproportionate to how you feel internally; it reflects a nervous system with less capacity to absorb friction than before.

Related reading

Why Am I So Irritable All of a Sudden? Perimenopause and Rage The 3am Wake-Up: Understanding Cortisol and Perimenopause Insomnia Progesterone and Anxiety: The Hormone Nobody Talks About

Disclaimer

This content is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health.