I was on the birth control Depo Provera and my last shot was last November and I have been bleeding since. It seems like menstrual cycle as I have all the signs: bloating, cramping (sometimes to painful to want to get up), nausea (at times it feels as if I were pregnant), and tiredness. Am I really suppose to be bleeding this long? I go through at least 3-4 boxes of tampons a month?