Ive been on birth control for about 4+ years now and just for the last two months after rough sex ive been experiencing breakthrough bleeding that will not stop until my period is done and over with and i start my new pack of pills what do?

An examination by a trusted gynecologist should determine whether or not your abnormal bleeding is due to trauma or a need for stronger BCPs.

I agree with Dr Lanover that you need to be examined. With the history of a change in your bleeding occurring after what you describe as "rough sex" I am more suspicious of it being due to trauma. But more history and an exam are essential to answer your question