Mam I have unprotected sex with my partner on 2nd of octo. Health Query Fertile Period Mam I have unprotected sex with my partner on 2nd of october and taken unwanted 72 within 3 hrs and today is 8th of oct I do not have any withdrawal bleeding and I have backache. Me and my partner have done protected sex yesterday and day before yesterday as I always have my periods after doing sex but unfortunately its not working. And one more fact is that in past I have also done unprotected sex and taken unwanted 72 and after exactly 5 days I got my withdrawal bleeding but now its 7th day I have not get my periods. Please suggest me. Some solution, is it necessary to have withdrawal bleeding please help me I am very much tensed lastly I have taken unwanted 72 on 11th of august and I got my withdrawal bleeding on 16th of august then I have my periods on 16th of spt. Normally before this I have taken unwanted 72 on 2nd of july nd got my withdrawal bleeding on 7th of july nd then got. My periods on 7 th of august normally.