Help! Condom girl on top pregnancy risk?

I had sex with my boyfriend with a condom and I was on top when he came. After I got off of him, we noticed liquid/white stuff on his body where the base of his penis is. It could be lubrication from the condom, or from me, or it could be sperm. We aren't sure and don't want to be pregnant. eve says that my fertility period ended a week ago (which means I ovulated a week ago, right?) And my period starts in a week. Do you think I am pregnant?