UTI??

Okay so I need help!
It started off as brown discharge (that was thick and smelled weird), at this point there was no pain or anything, about two hours later I wake up and it burns to pee and the discharge turned more into blood, but the discharge looked like webbing. Now it hurts to pee and I'm peeing blood, and i am also swollen down there anddd instead of brown discharge it is all blood now. I am not supposed to start my period for another 13 days but I did have sex 4 days ago and yesterday. I would say it's a UTI but I have never had discharge or cramping this bad with an UTI. I am not sure if this is something more serious like and STI, UTI, or just normal from rough sex. PLEASE HELP!! Xoxo