Hello Celine and welcome to the forum.
First, let me reassure you that you can get through the day even after a night of no sleep whatsoever. The body has an amazing ability to compensate for difficult nights and get us through the day.
One thing you can do to reduce the negative impact of the previous night on your day is to try to pursue some daytime activities that you find somewhat enjoyable. This will give your mind the opportunity to focus on something other than thinking/worrying about sleep and improve the overall quality of your day. It might also help you recognize that you can experience some positive (or at least some “OK” moments) even after a night of no sleep. This, in turn, can reduce arousal and help improve sleep.
Furthermore, since you had a night of no sleep, sleep drive is going to be very high — and this means that as long as you don’t do anything to reduce this sleep drive (for example by napping or going to bed earlier) then sleep becomes more likely on subsequent nights because sleep drive ALWAYS wins in the end.
Have you looked into cognitive behavioral therapy for insomnia (CBT-I) as a long-term solution for your insomnia? Since CBT-I addresses the thoughts and behaviors that perpetuate insomnia, you will likely find it very helpful. Furthermore, CBT-I is recommended as the first-line treatment for chronic insomnia since it addresses the root cause of chronic insomnia (our sleep-related thoughts and behaviors) — something that no pill can do.
I hope this helps.
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