Hey you could be pregnant,but don't freak out yet because if you tell yourself your pregnant you'll get symptoms. It really depends on when he came in you. If you were ovulating then there's a very big chance. You ovulate 14 days after the last day of your period. My fiance came in me for 3 months before I got pregnant, and I didn't know untill I was 7 weeks. Have you missed a period yet? I always slightly cramped for a few minutes like I was about to start my period, but I never did. Hope I could help you.