Just a question but need help...

Okay so I lost my virginity this weekend..San we used a condom well it started to slip off but I felt it kinda slipping off so I told him and he fixed it but we went back to doing what we were doing. He wasn’t close to cumming because we had just started and we weren’t even 10 or so mins into it well that’s what he said he said that he wasn’t close to cumming and nothing got in me well it’s my first time ever having sex so I’m scared precum got inside of me, but according to him nothing did. I know this is stupid but I just need advice to stop stressing about it. Thank you for the help!!❤️