I am on tri sprintec and have been on it for the last year and a half. I have never had any side effects. Last month i missed a pill (lost it) and had light discharge. i got my period normally. Had unprotected sex with my bf during the period but he didn't come inside. I started my new pack normally. Also had unprotected sex twice with him, once two days ago the other a week ago. I was late taking one pill (the next morning) two days ago. Yesterday, I started with a brown discharge that I still have today. Is this normal or could I be pregnant?