If you are having trouble sleeping, for Pete’s Sake, don’t worry about it.
Study after study points out that the human beings, no matter how sleep deprived, will eventually sleep.
If you have one, two or even three days of poor sleep, rest assured [ha!] that it won’t be long before you get a nine hour snooze-a-thon.
So relax. Read a book, watch a movie, play a game, take a walk. If you are desperate, maybe even do some work.
And know that it will all work out.
It always does, it is a law of nature.