when i was on my period i had sex without a condom but ive been on birth control for 5 months now. the next week i missed two pills in a row but i havent had sex since. ive been bleeding for a week now and i really don't know why. is this normal? i dont think im pregnant because im not having sex, i just dont know why i keep spotting. it's really light so i dont think its my period but im not sure... HELPP