question: I started the depo shot june 2012, i had my lost shot dec 13 2012. I didnt have a period the whole time i was on the shot. I started my period jan 2013 had regular periods after that. Well recently on april 20 2013 i started my regular period, stopped bleeding on april 27 2013. I then started bleeding again on may 4 2013. A week after stopping. What could be causing this??? If age matters i am 23 years old