question: Hello doctor, I need to know that having unprotected intercourse in the sixth day of the periods lead to pregnancy and also took I-pill within 24 hours. And after a week got bleeding which is persistent for three days now, had cramps the first day of the bleeding and far nothing but little bleeding is still there as it happens during the last days of the regular period. The questions are:  Is there a chance of pregnancy? Is this withdrawal bleeding? If yes, then for how many days should I expect it? Which date should I calculate my period date now? Subsequently, when should I take a test for HPT?