I had bled after having sex on Dec 1, 2015 and it happened for a few hours and then it stopped and turned brown on the same day. The next day I was bleeding again but it was heavy a little bit I did not soak any pads at all. More days I continued bleeding and it's day 12 now and I'm wondering what's going on here? It's like I'll stop bleeding and then start bleeding again. I just hope it's nothing serious because I'm on depo Provera known as the birth control shot.