Oh good. You should have your answer w/ cystoscope. Post as soon as you find out! Hang in there! :)
I had an ultrasound and the Doctor told me if I had kidney stones they would show up on the ultrasound. I am having a cystoscope next week so we shall see. He did not give me a CT scan. I do not have sharp pain though just an ache in the lower pelvis and sometimes the lower back. You also cannot see the blood accept under a microscope. This all started with a simple UTI. It took two antibiotics to clear it up but it left behind the blood in the urine and the aching in the pelvic region.
Did he chk for kidney stones? I too had blood in urine. Had a CT scan done & cystoscopy. Make sure they rule out kidney stones. You can have pain in your lower back to pain in your pelvis area as the kidney stone passes through the uretha, if the kidney stone is sharp it will cause blood in urine as its passing & it can take up to 6mths for one to pass.
HTH's & you feel better! :)