I had sex with my boyfriend 5 days ago and we didnt use a condom. I am on birth control but because of traveling, i didnt take it at the exact same hour (3 hour difference). He pulled out, and there was some semen on my leg. He doesnt think he came inside me but isnt sure so i doubled up on pills the next day and then continued to take the last 3 pills of the pack regularly. They say sperm can live in the body for up to 5 days, could i be pregnant?