I was married on December 2006 we didn't plan up to May 2007. i got my last period on May 25th after that we planned and participated in sex without condoms on 5th day of my period to 18th day but I missed period in June and July. I went to a doctor, but she told that very that everything thing was alright I was not pregnant. I was wondering are there any techniques or rules or positions for getting pregnant? And if I didn't get my period in August can I participate in sex and get pregnant?