The other night my friend had sex with a guy she likes. They used a condom and he got off of course. Like an hour later I had sex with him. (Bad, I know) Anyway, I could feel a liquid on his penis before we started, which I assumed was cum from when they had sex. We didn't use a condom and he pulled out, but I know that's not a very reliable method. Are the chances very high that I could possibly get pregnant?