Help Me

I am 18 years old, and last night my s/o and I were kissing and cuddling, and he ended up cuming in his pants. We never took off any clothes. I don't think he came near my vagina but I'm not sure. And we ended up falling asleep shortly after and he had his penis pressed up against my but. My question is, could I be pregnant? I have never done anything like this before and I am still a virgin, but I am so worried. Please help me!!!