What should I do? Help plz

So i have been having problems with my period since April 7 ( its sep 9) I have bled continuously for 119 with the exception of a week or two and I went to my doctor she put me on birth control to slow down and regulate my period it hasn’t worked at all but since starting it I’ve started getting cramps everyday and like belly fullness pain and now in the past two weeks I’ve been having reAlly bad stomach pain kinda like cramps but feels a little different and severe lower back pain my doctor got blood work on me and said everything looked fine but I don’t feel fine I feel like something is really wrong and I don’t know what to do I’ve always had bad periods and they’ve always been abnormally heavy but this now is just rediculouse I can’t even like live my life what should I do