I got my last regular period on February 13, 2007 and then about a week and a half later me and my boyfriend had unprotected sex and he ejaculated in me on 22nd of February. Some of the ejaculation leaked out about and hour later. I was supposed to ovulate that on the 25th of February but believed i actually ovulated on 26th. Since then i have been experiencing slight nausea without vomiting, and my breast are very itchy and beginning to become sore. I only noticed a white discharge this morning. I heard that sperm can live in females for about 5 days, which my have caused me to become pregnant. I know it too early for me to test for pregnancy, but what is the actual probability that i could be pregnant.