Chances of pregnancy?

Okay so Thursday night/Friday morning maybe around 12 or 1am I had sex with this guy. Before he put it in I rubbed of the precum and he went in raw for good 30 seconds at the start and then I told him that I wanted him to put on a condom and he put on one and we continued and finished like that. He didnt cum in me and the condom didnt break but I'm just curious. I was unable to get to the pharmacy for plan b and I have pregnancy anxiety I guess you could call it and I'm not on the pill (the sex was really unplanned). So what are the odds of me getting pregnant after starting sex raw for the first 30 seconds?