What Causes Prolonged Vaginal Bleeding After Taking Depo Provera Shot?

I have been on depo provera shot for about 2 months now. I have not stopped bleeding for a month . My breast size have dramatically dropped . I m 35 and I ve never heard of this shot before. The dr said it would only last 3 months but I keep hearing horror stories. Since I m 35 I wanted to have children n now I may end up being sterile. She mentioned nothing of this to me. I asked her for the pill and she told me this was better . Is my body ever going to go back to normal? Like if I buy estrogen online will my body stop bleeding and breasts Grow back? I feel suicidal. I honestly do. I was about to take all my dads morphine just to stop these psychotic attacks and body disfigurement. I was so healthy before. I honestly don t want to live that s how devistated not to mention the bone loss I lost 2 teeth and I had perfect teeth.