How would you feel?

So I went out with a guy today and we were kinda messing around in his truck. We previously decided that we weren't going to have sex, just so sexy stuff. So he's fingering me, I'm sucking his dick, everything's fine. I'm super relaxed at this point just kinda laying back and thought he was fingering me still. Turns out he's got his dick inside me. I guess I just feel stupid and used because he promised me we wouldn't do that. I'm a virgin, and I'm just kinda stressed out now. Like am I getting pregnant or what?? I know he didn't cum, but I'm just so stressed.