I no longer have trouble sleeping due to me getting used to taking naps after a night of little sleep and a day at school. Naps worked for me. But if I do have trouble sleeping now, I’ve realized it’s due to this: It’s extremely difficult to sleep when your eyes are focusing hard. You have to soften your eyes.
If you feel like there is a strain on your eyes, try this: Think about the area two inches above the roof of your mouth. I read this somewhere, and I swear you instantly feel more relaxed/drowsy. It also softens your eyes.
So, try that. Right now.