Pre-cum madness

Long story short: Glow told me that I had a 33% change of getting pregnant. My man and I had sex, he ejaculated, but if I recall correctly I don't remember him peeing before the next round in which he ejavulated again. We don't use condoms or any other method of BC besides withdrawal and it has worked great for the last 4 years. Usually one round is enough for the both of us but this was some serious makeup sex lol. I know that if he didn't urinate before the second round then there's a possibility of leftover Sperm being in the precum so my question is: Has anyone experienced this before and got pregnant or should I not be too worried?