How long after sex do you wait to pee?

Been ttc for a year now and things just are not happening. We BD at the right time, I have lots of CM to the point I feel like I peed my pants, and I'm healthy. But I have realized that after we have sex at night and I lay there sometimes and fall asleep and don't pee till 4am or so like last night. That today vagina feels like a coming of a UTI. So maybe I should pee like 10 min after sex so I don't have this feeling. How long do you all wait?