Does Getting off Depo-Provera cause abdominal pain?

I'm not sure if it is normal, but I've been on the depo since Nov '09, I've been bleeding since then. I recently got off the depo July '10 because I constantly bled and my stomach always hurt. I got tired of it and I've been off for about a month now. My bleeding is HEAVY, I have to change four times a day and I constantly have stomach pains. I advise you to go to the doctor, because I set up an apt. I'm not sure if I'm suppose to be experiencing this.