Tearing..?

So the other day me and a guy I've been on and off with had sex. Nothing different was done during it, but we did go longer than usual. And yesterday I noticed that it burned to pee. (Not the pee hole though) I didn't think much of it, but when it continued to today, I looked down there and there's a spot on the inside of my inner lip that's more red and it looks like there's some sort of tear. Anyone else experienced something like this..?