i don't think i'm pregnant, because i have NO symptoms other than a missed period. my boyfriend and i use a condom that he checks whenever we're finished AND i'm on birth control. about a week ago, i had a LOT of brown discharge for about two days. today was my first sugar pill in this pack, and i usually start the day of the last regular pill. what's going on? is it possible to miss a period because of stress even if you're on the pill?