I'm really confused about my recent urine test results. It seems like every time I get tested, the RBC count comes back as 23 HPF with a weak reaction. I also had a KUB CT Scan and Ultra sound, plus urine Cytology and a PSA Blood test, and all those were normal. Out of 67 urine routine tests, two of them showed 56 RBC. The CT scan did show a 2mm renal calculus below my left kidney. Since everything else is normal, I'm having trouble understanding why there's still blood in my urine. Is this something I should be worried about, and do you think getting a Cystoscopy is necessary to figure out what's going on?