Her periods are late this month. We haven't had sex, but half way insertion had taken place. No ejaculation. To be on the safe side she took ipill, on the very same day. And one more the next day. This happened in November. Her periods have been regular until this point. Next month it was on time. But lasted lesser than usual. In January it was late by 2 days, this time lesser than usual, lasted only 2 days (normally is 4 days). This is the 31st day (usual cycle is 25days). She hasn't had period yet. Could she be pregnant?