That last two day I've wiped after urinating, and there has been light pink brownish color on the toilet paper. My boyfriend and I had sex yesterday but that was during the day, we haven't today, if that has anything to do with it? I don't have any other symptoms, I've had a bladder infection before and that couldn't be it. I'm very worried, I also forgot to take my birth control yesterday, haven't taken any since. What could this be, should I seek medical attention right away? Could it possibly me pregnancy?