I started BC around November 19th and have been on time. Had sex with out a condom the 21st of December. Since the 1st of January I have taken BC between 1-2 hours late....I'm on my off week for birth control and should be getting my period in 2 days, but I have been feeling tired, some food I just don't want to see and other I crave, and my breast are tender. Could it be that I'm pregnant? I don't think so, I also just got back from a vacation and drive back, so that might be why I'm tired.