I was on the depo shot july '08 - semptember '08 and have since then been off all birth control. I had a period every month starting in september - january '09. I havent had one since january 10! I was wondering is it still possible i could get pregnant? I've been having cramping as if im going to start my cycle but no bleeding. Can i be pregnant and be having implantation cramping? why would my periods just stop so suddenly and not start back yet?