I NEED ADVICE

So my S/O and I always have sex with condom , today we did the usual but after our session and after he threw both condoms away things got a little heated again and he slid in raw. When he slid in there was no pre cum , but I'm just very anxious, I told him that I was scared for him to slide in raw because I knew that we didn't have a condom. And right after he slid back out I saw pre cumbcome out so I'm very very scared if maybe pre-come came in while we were doing the dirty LOL. I also know that there's a very slight chance to get pregnant off of pre-come.He claims that no pre-come came out so should I be worried?