What Causes Discomfort In Urethra With Blood In Urine?

I HAVE DISCOMFORT AND I THINK I HAVE UTI BASED ON PREVIOUS EXPERIENCE.
I HAD SOME BLOOD IN URINE UNTIL I STARTED TAKING LEVOFLOXACIN. IT APPEARS THE BLOOD IN URINE STOPED (FOR NOW). I HAVE DISCOMFORT IN MY URETHRA. I WONDER IF SAID BLOOD CAME FROM MY URETHRA OR MY KIDNEYS. IS THIS SILENT INFECTION UNTREATED?
I AM VERY CONCERNED.
WHAT IS THE FEE FOR YOUR MEDICAL ADVISE?