Suggest Treatment For A Heavy Menstrual Period

Hi, I have been on Depo now for nearly over a year and I am still getting my menstrual cycle... Only it's not regular. It's extraordinarily heavy at times and it continues on for over a month. I have always had irregular periods but now it's gotten worse and it's totally unpredictable. I just got my last shot not more than two weeks ago and I am now going through my period... What should I do?