I do that too! I always walk around and just yell things in the room in order to retain focus again. I would face this situation head-on and ask if your roommate minds. You should explain that you have a disorder and that you might be doing many quirky/weird things in order to focus well in school. Make sure you are confident and stubborn in this, because school comes first! If it is really really REALLY bothering them, maybe look into switching roommates. This is your education, not their’s.