question: last month i got my periods on 11th then we started having unprotected sex from 15th July onwards,average weekly 3or 4 times as we are planning for kids now...but in i didnt become pregnant and i got my periods in august 1 week delayed thats on 15th August,normally i have 28 cycle periods.Please tell me the reason for not becoming pregnant and reason for 1 week delayed periods,also tell me the safety measures to be considered in future to become pregnant.Me and my husband both 29 years old.