I had sex yesterday and while in intercourse I felt a slight sting but didn't think anything of it. Right after I felt the urge to use the restroom and while using it, I was in extreme pain and it burned really bad. Also the toilet bowl was filled with blood. That is when I became seriously concerned. I have a history of urinary tract infections but the pain was never as bad as this time. I woke up today and used the bathroom hoping the pain was gone but I was wrong the pain is even worse and blood was still coming out. I am very concerned to what it might be. Please help