My hurts and when i pee im in intense pain and the urge to pee is frequent, why?

I constantly feel like i have to pee and my l walls are killing me even when i walk. When i do pee its hurts so bad comming out i almost cry. It feels like its burning. This happened after i had . This man has a larger then what i have ever had before. We have had only twice before today and for some reason it hurt really bad while he was in there but i faced the pain anyways. Maybe i was not sufficiently lubricated? Maybe he's to big? It was fine after i left the pain started about 4 hours later. I know for a fact he does not have and STI's because he recently got tested. The pain is intense even when im sitting. There is some white, almost clear discharge comming out, no odour, but it kinda hurts comming out... why? Maybe he was to big, too rough i dont know. Thats what i think it is.