Hello there. I have read through your question and would like to tell you that there are very rare chances of pregnancy after taking unwanted 72. But after taking it the next one or two cycles may get delayed. So it is advisable to get an urine pregnancy test if her next period is delayed. Secondly lack of bleeding is not a confirmatory sign of an intact hymen. It can break due to many reasons and There may not necessarily be any bleeding. You said that you had unprotected sex a number of times after taking the unwanted 72 which is not advisable if you don't want a pregnancy. I hope that answers your question. If you have any further questions please feel free to write. Thank you for choosing healthcare magic.