Hi, So My Boyfriend And I Decided To Have Sex

Hi, so my boyfriend and I decided to have sex for the first time. We didn't use a condom but the actual sex part lasted less then 5 minutes because I didn't want a chance of getting pregnant. He didn't *** inside of me and he didn't for another 10 minutes. I haven't had my period yet, is there a chance I could be pregnant? My most recent period came 2 weeks early so it has been a bit irregular.