Okay so I'm 16 and I'm on birth control. Maybe a week ago I was on antibiotics for an ear infection. I heard that the BC pill is ineffective when you are on antibiotics. My boyfriend and I still had sex, and we used a protection. I've been peeing a lot more than usual, and lately I felt a little nauseous in the mornings. I don't know if I'm pregnant or If I'm just crazy. Please help!!