My girlfriend has been taking birth control regularly for about a year, when we went on vacation she forgot to take her pills so she missed 3 in a row, (she had spots of blood when she missed the pills) when we got back she took the pills and then for about a week she took her pills normally, we had unprotected sex, I pulled out, and then we got plan B the next morning. She was supposed to have her period yesterday and hasn't had any signs of it yet. I've read that plan b can mess up her period cycle and delay the period. Just any thoughts on the situation would be appreciated. Do you think she could be pregnant?? Does missing the three pills really make bc not as effective, even if she made up for it?? Could the spots of blood have been her period for the month and should we just wait for her to have one next month?? Please help