So my cycle is always over 28 days - sometimes up to 32

I started my period on the 30th June and it finished yesterday, the 3rd. (Quite short only about 4/5 days)

Me and my partner had unprotected sex once last night and 4 times today(a lot I know lol) they were close enough together so obviously sperm from the previous cum was still remaining and there obviously precum

He pulled out all of these times but the last time we were standing up and he came on my back and his cum dripped down in between my bum cheeks and onto my vulva etc

What are the chances of me conceiving under these conditions - straight after period so haven’t ovulated and unprotected but pulled out?