Sexually active!

My fiancé and I have finally began being sexually active. I've been on my period for three days and today is when we had sex. It's a long distance relationship so it's difficult to see each other and I finally got too! My question is, what is the likelihood of me becoming pregnant? He came in my three times and I know sperm can stay in the vagina for a certain amount of days so I was wondering if there is any chance at all. My period usually lasts 5 days so I only should have two more days to go. Thank you in advance!