My girlfriend took plan B on August 18 and had her period on that cycle. No intercourse happened because it was painful for her. She took the pill to give her peace of mind and prevent anxiety from getting pregnant. And then on September 8, intimate things happened, but this time I put a condom on, and still no intercourse really happened, we tried but it was painful for her. But again she took the plan B pill. A week after taking the pill, she bled for 3-4 days. But since then she hasn't had her period for this cycle. Why is it like that? What should we do? Could she be pregnant?