Eat something, lie down, close your eyes.
If you can't eat, don't. Forget the eating issue.
Try some milk instead.
Move on to the lying down section.
Listen to some music or an audiobook.
If you don't want to, then don't.
Just lie there for at least 30 mins, but without any "questions" going on inside your head.... hence the music/audiobook tip.
No point trying to figure out an answer that cannot be answered, you can see what that is achieving.
Just let it go.
You will be surprised what a 20 minute lie-down without sleep feels like after being "amphed/amped" .....IME the same as 6 hours solid sleep,, seriously, no shit.
So try relax, it isn't hard if you just ignore the "need to know" the answers.
In fact try forget the word "question" exists.
Humour me and just try it.
I wouldn't be responding if I didn't know what I am talking about.