Okay, so I take birth control like I am supposed to. However, a few weeks ago me and my boyfriend had sex on sunday night. I forgot to take my pill that night, and then the next day I had to take four amoxicillin because I was getting my wisdom teeth out that day. Is there a chance that I got be pregnant? People have been telling me that antibiotics completely cancel out birth control but, I'm skeptical. My period is supposed to start in four days.. should I go ahead and take a pregnancy test?? Someone help meeeeee.