Plan b ??

Ok so basically I was having sex with bf and I was on top and his dick slipped out but he still had his condom on he says and I trust him, the thing is when it slipped we were messing around trying to put it back in without using hands so his dick was touching my vagina but it didn’t go inside but even if it did (let’s say an example) and he hadn’t came yet, is there a good chance I could get pregnant?