I have been on birth control for cramps for almost a year now. I am in a happy relationship with my boyfriend. I got the flu the last week of December, 2012. when i went to the Doc. they gave me antibacterial medication and told me it would counteract the birth controls effectiveness. you have to finish the whole bottle of antibacterial meds and I did but i also was taking my birth control. I had my period the very last week of December as well as the flu. I got better around Jan. 4 and also stopped my period. On Jan. 6 i had sex with my boyfriend. He went to the restroom to cum so he wouldnt get me pregnant bc we did not have any condoms. the sex was incredibly short because it was difficult for him to get aroused since he just cummed in the bathroom minutes before. So as the weeks went on I noticed I missed my period that was supposed to happen the last week of Jan. so i took a preg. test and it came out negative. I was relieved but not entirely convinced. I wait until about 2 weeks ago to take another one. And it still came out negative. This past tuesday i thought i started my period when in all actuality it was just brown mucus coming out of my vagina. It would happen irregularly throughout the day. I am hoping to start my period soon but it obviously hasnt happened yet. Im planning to take a pregnancy test but what if it says negative again? should i really trust it and take another one? any advice will help. thank you