My period last for like 3 weeks only to stop for a couple of days then it starts again. there is some pain but i also have pcos and i am on the pill. ?

PCO, BCP, Bleeding: The amount of bleeding seems excessive to me and i recommend a visit to your doc. Pcos can cause irregular bleeding (but usually infrequent) but the bcp should correct that problem. I doubt a serious problem for you (perhaps anemia) but certainly no one wants that much bleeding. I am certain that a change in bcp or other medication can correct the problem. Best wishes.

Depends: You may need a different pill, would check with your doctor.