17 days ago I had these symptoms(burning, urgency, then three times blood and a sharp pain at the end of urination. I then drank tons of water and juice. the next day the symptoms went away, but I went to urgent care. They found no infection but gave antibiotics just in case. I have had no symptoms since that 1 time 17 days ago. I had a full blood and urinalysis( showed no cancer cells in urine. I then had the CT scan with contrast. The scan came back completely normal, but no sign of stones either. Now my doctor wants me to get the Cystoscopy since I have no signs of stones or infection. I keep getting crazy thoughts that I have cancer and maybe an advanced one. Am I just having anxiety? How much should I be concerned?