I haven't had a period in 3 months and it does this and then I have my period which can be heavy and then not have it for 3-5months again. I was wondering if I could have cyst on my ovarys and that it could be causing this. I'm also overweight i'm 5'4'' 190lbs. They are thinking of putting me on birth control but I don't want to be on birth control the rest of my life. any advice?