First time🙈 am I pregnant?

So I "played the bases" with a guy this morning and we originally planned on just doing oral sex but it was in the moment and we didn't have a condom but asked if he could stick it in real quick just to feel what it feels like (it was both of our first times). I let him for about a minute till I told him to pull it out. He never came or precummed in me. But he did grind on me too. Should I be worried about pregnancy?