Should I be worried? Could I be pregnant?

I just had sex with my boyfriend and the condom came off inside me. We realised almost straight away, I removed it and he definitely didn't cum inside me. Although there was obviously some precum in the condom. Beforehand he had pee'd since last ejaculating and I went to the toilet straight after and went in the shower to 'wash anything out' (don't judge me, I was panicking). I know there's a very slim chance of getting pregnant from precum but I'm on my first day of the fertile window (9% risk) and I'm worrying. What are the chances I could be pregnant?