abnormal uterine bleeding
"I've on the shot for two years. I received the shot a few days after my 6 weeks check up after having my baby. The first year was okay, I was still having a regular period but it was just light. Going on the second year, my period would start back like a day or 2 only after intercourse. I got to the point where I would spot every now & then. My last shot, I spotted or bled for a whole month nonstop. I'm just going back to the pills, I'd rather have a regular period than to bleed a whole month."