Confused! All advice/experience welcome

Bree
Ok... a couple months back I was taking Falmina (or something like that) and it was birth control to help regulate my periods. I HAD to stop taking it because in two months I had gained almost 20 lbs!!! But now my periods are even worse. I'll have a regular period and now I'll bleed/spot for like a week and a half after that! Anyone have issues like this? I'm going to see my gynecologist soon but I'm curious.