BARE DICK help

So I had sex while I was drunk a few days ago and my boyfriend can't finish while he's drunk, and im not sure if he pre-came either. After the fact of realizing that it just wasn't going to happen, he took the condom off and put his penis in, and only stroked twice. I'm super scared that I could get pregnant from just that, but I could just be overthinking. So basically I'm just wondering what the odds are of me getting pregnant from that.