I am the same way as far as seeing things and having the music in my head that keeps repeating over and over. In fact, I plan to talk to my pdoc next week about it. I think talking to your pdoc will help. It seems to be part of BPD.
I know that stress can make theses matters worse, so try to relax as much as possible. I would try breaking your studies down. I used to study for exams by writing bits of information on notecards. The writing would help curb some of the anxiety and I would have little cards to go back through when I was feeling better. You can do this!!!!