Feels weird..?

So I have these time periods where sex doesn't feel all that great, I know it's not supposed to feel great all the time but I have this weird feeling when I do have sex? Like there's a pressure in there and I need to pee, I have been getting this feeling a lot where I do need to pee badly but barely do (sorry if thats tmi). It doesn't hurt or anything like that, just feels a bit off. Any ideas or help?