Help!!!!!!!Hello, my girl friend has been on birth control for little over a year now. She uses her birth control all the time correctly. I wear a condom every time. And I pull out before ejaculation. Last month she got her period just a few hours late, and it was completly normal. I had her take 5 pregnancy test from the last day of her period to a week or so before her next. They all came back negative. Do I have anything to worry about? Please help!