Condom slipped

Last night he didn’t penetrate me but before he tried bc I’m a virgin but it hurt and only the tip went in?? but he was rubbing my entrance and clit with his tip and I got up off of him and he said that it slipped off when I got up but I’m just paranoid bc I feel like it wasn’t on the whole time like near the end when I was about to get off of him(no clothes on) ??? I’m just scared of getting pregnant and it was on my last fertile day too and idk if there was precum when he was rubbing me