Curious

So me and my boyfriend had sex for the first times with each other. The third time we did it he got new condoms (the Trojan “for her” kind, tryna be a sweetheart) but they didn’t fit him as well as the others we had used. He finished in the condom but while he was still inside me. I was wondering what the chances were of pregnancy if we have a condom, albeit not the best fitting?