Okay. So Me &I My Boyfriend About A Week Ago

Okay. So me &I my boyfriend about a week ago had been having sex like a lot & about two to three days ago my vagina started to get rather sore almost & then not long after that it started to burn when I peed. So I was thinking I had a UIT but today a tool a mirror & looked to see if everything looked okay & something was off. At the opening of my Vagina on the inside but not you know deep just far enough that I can see there white &I I can't tell if it white bumps or white skin but all I know is I feel a slight burn all the time &I when I pee its so painful I could cry. I've had a UIT before & I don't believe I've ever had white on the inside. Ugh. I really need help.