Ovulation

So last night I had sex with my boyfriend I was on high chance of pregnancy but I used protection and no incidents happensed but the only thing that is kinda stressing me out is that on the first round we went it raw for like ONLY 3 seconds, he made sure he was dry and had no pre cum or anything so we was good and he didn't came in me or anything so I don't know why I'm stressing but should i worry ?