You're young. It's only natural for you not to know what to do. Actually, few people in your place would know what to do. No, I am not trying to sound hopeless. I just want to say that when you don't know what to do, just don't do anything. Relax and trust. You'll be cared for.

Anyway, it's very important for you to have the right nutrition. I don't know to what extent you can choose what you eat. If possible, avoid junk food. That alone will be a great step towards health and sanity.
There's a product by the name of Mental Clarity which could be helpful in your case. It's a mushroom. It aids neurological repair. See (and ask) if it is useful in your case.

Good luck.

José