Anxiety and Insomnia at Night: How to Break the Cycle
For high-achieving women whose minds get loudest when the lights go out.
Sandra White, Certified CBT-I Clinician, Harvard Medical School Doctor-Trained
Last updated October 22, 2026
All day you're capable, organized and calm under pressure. Then you lie down, and your mind turns on you. The email you should have sent. The conversation you've replayed four times. The worst-case version of tomorrow.
Sound familiar? Anxiety and insomnia feed each other. Worry keeps you awake, and a short night leaves you more on edge the next day, which makes the next night harder. Round and round it goes.
I'm Sandra White, a certified CBT-I clinician trained by a Harvard Medical School doctor. I spent over 20 years in corporate, with leadership roles for roughly the last decade of that time. I know what it's like to lie awake thinking about work. CBT-I helped me change my own sleep, including the thinking that kept me awake.
Why anxiety gets louder at night
During the day you're busy, so the worries get pushed to the side. At night there's nothing left to distract you. The dark and the quiet give your mind its first open space all day, and it uses it.
There's another reason. When you're tired, and especially in the middle of the night, it can be harder to put worries in perspective. A problem that feels manageable at 10 AM can feel like a crisis at 3 AM. Try leaving it until morning, when you've had some rest and can think it through more clearly.
How high achievers keep the cycle running
If you lead at work or in life, worry can feel responsible. Think through every possible problem and you're prepared, right? At night, that same habit turns into a planning session in bed.
Then the worry turns to sleep itself. "If I don't sleep, I'll be useless tomorrow." That one thought is enough to keep you up. Before long, bedtime becomes something you dread, and the dread does the rest.
What helps quiet a racing mind
- Give your worries an appointment. Earlier in the evening, take ten minutes to write down what's on your mind and one next step for each. When it comes back at night, you can tell yourself: already handled.
- Build a buffer between work and bed, so your mind has time to slow down before your head hits the pillow.
- If you're lying awake and anxious, get up. Go somewhere with low light and do something calm until you feel sleepy. Don't let the bed become your worry spot.
- Notice the thoughts as thoughts. "I'm having the thought that tomorrow will be a disaster." Then check the evidence. "I'll never sleep properly again." Really? Never? These are thoughts, and they can be edited. This is a foundational step in CBT-I, and it works!
- Use your breath. Make your out-breath longer than your in-breath. It tells your body it's safe to settle.
- Keep the same wake time every morning so your body knows when sleep belongs.
CBT-I works on both the habits and the thinking that keep insomnia going. It doesn't replace care for an anxiety disorder, but when sleep improves, anxiety often gets easier to manage too.
When to get more support
Talk to your doctor or a mental health professional if:
- Anxiety is affecting your days, not just your nights
- You have panic attacks, or the worry feels impossible to control
- Your mood is low or you've lost interest in things you usually enjoy
- You have thoughts of harming yourself. Please reach out to a crisis line or emergency services right away.
Anxiety is very treatable, and sleep work fits well alongside that care. Please don't start, stop or change any medication without talking to your doctor first.
Related reading
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See what's behind your sleepless nights
If a busy mind is what keeps you up, the Find Your Sleep Profile quiz can show you whether that's your main pattern. It takes about two minutes. And if you'd rather just talk it through, book a free 20-minute consult with me.
Find Your Sleep ProfileThis article is for education only and is not medical advice.