Hi I had unprotected sex on the 22nd of august and have no bleeding so far (where I have heard it is suppose to happen within 10 to 12 days and today is the 11 th day,)my periods last month was on the 9th, am really confused if am pregnant or no because I did take postpone 72 after 4 ,5 hrs of sex that day. You think I should have bled by now or wait n see for my menstruation date,?am worried.