What is it that you can't sleep well in the university dormitory? I slept well at home. I slept like a dead man in the university dormitory and didn't want to go to the toilet.
It may have something to do with mental stress. Try to relax yourself, listen to music, read books, exercise more, try not to think about it, and see if it works. I had insomnia for two years before, but I just need to adjust my mentality later, and I have already taken medicine for treatment. It's no use. You can try it for a while, and if you don't get better, go to the hospital, so you can rest assured!