[noadvicebutnice]

Went through something similar recently. Start by teaching yourself how to sleep.

The root of your problems is something else though. I like science, so this helped me more than anything else: https://www.youtube.com/watch?v=NqtYZJSGeEY.

Everyone will suggest professional help, and you should seek it if you're comfortable, but the Internet has everything you need at this point. I'm sure your adventures have trained you in the Art of Googling.