I just ended my last period about a week and a half to two weeks ago. Before that my boyfriend and I had protected sex a couple times. Also, I am on birth control. My period started to get late, but I am pretty irregular anyways, so I wasn't worried about it. I finally had my period for my normal 5 days. Then my boyfriend and I had protected sex two days ago and I started bleeding today- very light and kind of brownish. Does this have anything to do with being pregnant???? We use a condom every time, I am on birth control, AND he pulled out last time (with a condom). What's wrong with me?