Okay, I had sex with one guy on December 24 and ended up bleeding the morning after. It was four days of heavy bleeding movie to light on the fifth and stopping on the sixth. I stopped my birth control a month and a half before that due to complications. But in the meantime before this random one night I have been having sex with my FWB for well over a week. When I took my pregnancy test the line was so faint I almost couldn't see it. That was the 20 of January. I'm just trying to figure out when I got pregnant and who the father is without waiting nine months.