I'm worried there's a chance I could get pregnant but I'm hesitant to take Plan B because I'm supposed to get my period next week and the box said that if your period is delayed by more than a week, it's possible you could be pregnant. However, the chance of pregnancy with my situation is not high. I'm taking it as a precaution. My situation happened Monday ("technically" yesterday). Should I take the pill or just wait a week..?