Feeling exhausted does not always mean feeling ready to sleep. You can be tired while your thoughts remain busy or your body feels alert. Worry about tomorrow can then turn into worry about not sleeping, adding another layer of pressure.
Researchers describe heightened mental or physical arousal as one possible part of insomnia. It is not a complete explanation for every person, and a difficult night does not show that your cortisol is abnormal.
Why trying harder may not help
Sleep is not a task you can complete through effort alone. Repeatedly checking the clock, calculating the hours left or testing whether you feel sleepy can make the night feel more threatening.
That does not mean you caused your sleep problem. Pain, shift work, medicines, caring responsibilities, sleep apnoea and mood disorders may also matter. A useful plan considers these possibilities rather than assuming the problem is only stress.
Take some pressure out of the evening
Choose a wind-down that fits your circumstances. You do not need an elaborate routine or a fixed number of minutes. A quiet activity, a comfortable light level or writing down tomorrow's next step may be enough to try.
If worrying thoughts return, you can acknowledge that the issue matters and choose a daytime moment to address it. Writing is optional; stop if it turns into extended problem-solving in bed.
Try to keep a reasonably consistent wake time and allow enough opportunity for sleep. Avoid using alcohol as a sleep aid. These habits can support sleep, but sleep hygiene alone is not the recommended treatment for chronic insomnia.
What CBT-I adds
Cognitive behavioural therapy for insomnia, or CBT-I, combines several strategies to change patterns that maintain insomnia. The American Academy of Sleep Medicine gives multicomponent CBT-I a strong recommendation for adults with chronic insomnia.
One component involves leaving bed for a quiet activity when you are awake and frustrated, then returning when sleepy. This is not a rule to watch a 20-minute timer. It needs adaptation if getting up creates a fall risk, mobility difficulty or another safety issue.
Another component adjusts time in bed. Do not start an aggressive sleep-restriction schedule yourself, particularly with bipolar disorder, seizures, significant daytime sleepiness or safety-critical work. A trained clinician can tailor the approach.
When to ask for help
Chronic insomnia generally involves sleep difficulty at least three nights a week for at least three months, with daytime effects despite adequate opportunity to sleep. You do not need to wait three months to seek help, especially if functioning or safety is affected.
A short sleep diary can support assessment. PsychPod can hold your impressions, but it does not measure sleep stages or diagnose insomnia. Skip overnight score checking, and never drive when sleepy.