Did I make a mistake?!

So my boyfriend and I had sex yesterday a couple of times with protection. I was curious to see how his dingaling would feel without a condom. He had checked to make sure he didn’t have any pre cum and then entered me he did 2-3 strokes then pulled out put on a condom then we had sex normally. What are the chances of me getting pregnant? Am I going to be ok or should I worry?!?