I am 18 years old and on Azurette birth control (have been for about 2 years). My periods have always been slightly irregular within the sugar pill week (sometimes I'd get it a few days before the last week of pills, sometimes on the last day of the pack) I have not had intercourse but this guy and I fooled around and his penis touched my vagina for a brief time. It did not go in and I'm not sure if he had any pre-ejaculation on him. The fact that I have been on antibiotics all month for a sinus infection and now bronchitis is what really throws me since it could de-activate my birth control. I know the risk is like .000000000001 percent, but I have been under much stress and have been losing more and more sleep over other problems and this just adds onto it. I am a senior and going into college next year so I need to figure out my life essentially and that can not include having a child plus there is no planned parenthood near me. I know stress and sleep can throw off my period even more so please help me!