Last evening, my boyfriend and I (stupidly, I know) had unprotected sex, although he pulled out. It was the first day of my period but the bleeding was very very light. I later that evening started my first dosage of Levlen ED. I understand that you are meant to be "protected" if you begin taking the pill on the first day of your period. However, I'm not sure if that works in this situation or not. Should I buy the morning after pill? I know it's difficult to get pregnant if you have sex at the beginning of your period, but of course I'm very concerned anyway. I know we shouldn't have done this.