Help please

So I think I had sex on a day that I ovulated. Late Saturday night early Sunday. I’m on bc but was taking antibiotics. We used a condom and he pulled out before finishing. There were no apparent leaks or tears so the only way I could have gotten any sperm in me is if there was a leak or tear that we didn’t notice and it was precum. I took a plan b yesterday around 5:30 because I started to get worried. Am I being too paranoid now. I’m really scared