Side thought, having bipolar is NOT an excuse for shitty grades.

But in all seriousness, if you really wanna get A's you will. Tell your professor your situation. More than likely he/she will help you if you need it. Just bunker down and study, study, study. I assure you your not the only college kid thats in this situation. I too have to pay for all my college by myself. My parents ended up having to use my money to pay for my cancer stuff.