Possible to get pregnant from precum?


I posted something about this a few days ago but I didn't get many responses. I ovulated 3 days ago, and I had unprotected (its always unprotected/no birth control) on July 7th and 8th. I know that he did urinate between those times and there were no multiple sessions. Just once on each day. He pulled out both times but we were drunk. What are the chances of concieving? In the 3 years we have been having unprotected sex, I have never gotten pregnant. Part of me doubts weather I can or not!