Kinda gross... Not sure what to do :/

Okay so earlier today I was giving my SO a blowjob, and instead of cumming, he peed. In my mouth. I understand that it wasn't on purpose but I can't stop thinking about it. And when I think about it too much I start to gag a little bit😷. I'm not really sure what to do. I talked to him about it for a minute after and he told me he was mad at himself because it happened so if I talk to him about it again I know he'll get upset. I love him and this doesn't change that, but I just can't get to out of my head😞