Is this normal?

I don't know if this is normal but I'm TTC. sometimes when I have sex it feels like I'm about to per so usually I go to the bathroom. But it never really feels like pee. So this morning I had got the sensation to pee and this time I just put a rag underneath to catch it. And I was wondering it is possible that my partners semen came back out? it happens rarely. But it look like it was nut.