I had sexual inter course yesterday and right after there was brown discharge and a little this day. Ive had inter course before (all times including yesterday, we used a condom) and the brown discharge hs never happened before. I've been on birth control for almost four months now (Loestrin) and I have not missed a single day. My last period ended almost two weeks ago so I'm about two weeks before my next period as well. Is the discharge due to the pills or could I be pregnant???