Can anyone please answer this question for me, I just really need to know. My boyfriend & i had intercourse on the weekend of march 1st thru the 3rd and I'm assuming i starting ovulating the day after (14 days before my next period). They say that the sperm can live inside the women up to a week. So my question is could i be pregnant if i came on my period March 18th - 22nd. Would i get that last period before the spem hits my egg and then i'll become pregnant. Just curious. My period was two days short. I usually stay on for 5-7 days never 3-5.... Any opinions to put my mind to rest?