How big of a chance of pregnancy ?

So I realized after I had sex this morning that I’m ovulating. I got off the pill like three months ago and been on it for like 5 years. Anyways we had unprotected sex this morning and I was on top. He pulled out and came. and we were kissing and I sat back down on his dick and we had sex for a little bit again. Even tho he pulled out and came on the outside of my vagina, how big of a chance is there for pregnancy if he still had cum on his dick when I sat back down on it and started going at it again ?