Chances?

Unprotected sex between cycle day 9-10. Ovulation predicted for CD 17, but may be a day or two earlier. Lots of EGCM. He pulled out and finished on my abdomen but there was sooo much it leaked down my vulva. (TMI, sorry).

Chances of pregnancy? I'm not concerned, we'd welcome a second baby any time with happiness, but what are the chances? Anyone have similar experiences?