How likely is pregnancy from precum?

Julia • 25 💁🏼‍♀️ Trying to live my best life
My boyfriend and I had unprotected sex with the pull out method the other day, and then we did it again but he didn't pee beforehand (as in between round 1 and round 2). He said that he felt something maybe come out twice but he wasn't sure. Was that pre cum that he was feeling? If yes, what are the chances of becoming pregnant from this? Has anyone gotten pregnant from precum this way? TIA :)