Posted it on sex and love as well. Just want answers! Please.

So I’ve noticed that every time my boyfriend and I have sex without anything I end up with a burning/stinging feeling when I pee after . (I’m talking days after, like a UTI or something) I had gotten tested and everything came out good, could it be possibly be on his part? I’ve been thinking about it a lot. When I got tested we went together and he got it done too (but the difference is I showed him the results, on his end he told me, didn’t show me. That everything had come out good , should I have enforced it??) help please. And please be kind. I’m really wondering