Hi! If I had sex for the first time the day that I should have gotten my period can I still be pregnant? My last period was August 29 and I was suppose to get my next one September 26th the day that I had sex. My boyfriend used the pull out method which I now know can not be trusted but I am positive that he did not ejaculate inside of me. I am only 16 and I don't know what to do my period is usually on time unless its 2-3 days late because of stress, can it be that? Please help