Painful Urination

So I am going to the doctor tomorrow BUT since Tuesday or Wednesday I have had painful burning urination, today it got really bad. At work after I peed I still had the urge to pee and a burning sensation. I also had lower pelvic pain and felt a bit nauseous when I got home. I got home and peed and there was blood in my urine, I have had UTI's before that have been excruciatingly painful but never blood in my urine so I'm very worried. I read that blood in urine can also be a symptom of a UTI or kidney infection among other things. Also, I almost never pee after sex (I know, I should), and had a bad kidney infection when I was 8. Anyway, I want to know if any of you have had these symptoms and what the result was?