Medroxyprogesterone
"My normal period last four days. I just started the depo shot, and my period stopped for about a month. Two weeks ago I started bleeding, I've been bleeding for 15 days straight! I go in a few weeks to get my next shot. If the bleeding doesn't stop soon, I'm gonna have to go back to the doctor to figure something out. My cousin started the depo before me, her period stopped for a while and then all of a sudden she started bleeding for 12 days straight."