Broken condom but pulled out before ejaculation

Okay so this might be a dumb question but I was having sex with a guy the other day and before he finished he pulled out and noticed the condom had broke. I saw him ejaculate and didn’t feel anything inside me afterwards until today when I went to the bathroom and a piece of a condom fell out. It was a meaningless one time thing so I really don’t feel like I can ask him about it but I’m nervous I could get pregnant. I realize I should take responsibility for my actions and shouldn’t have sex if I can’t deal with the consequences but I need some advice. How likely is it that I could get pregnant if he pulled out before he finished?