The last couple times i have had relations with my BF has been before i needed to take my BC or i completely left it at home and forgot about it.. i wasnt worried because i had my period a week ago and everything was fine. but now a week later i started to bleed again. but its only a brown/light pink discharge only when i wipe. it comes and goes but i am getting worried because this has never happened to me before. could someone please give me some advice.