ok so i was on birth control for 3 weeks before i had sex without a condom i have never had regular periods which is why i went on birth control. i got my period a week later and then a month after that.. but then two weeks later i got a lot of brown discharge which turned into a little bit of blood. my doctor said it could just be irregular bleeding because i had only beenon birth control for 11 weeks when i asked her about it. but im nauseous a lot and have headaches and weird feelings in my stomach and im really bloated and have been really tired. i took tests that were negative but for some reason im still really concerned about it. if i was going to get irregular bleeding from my BC why didnt i get it until 11 weeks into it?