Thanks for your query.Based on the facts that you have posted it appears that you have repeated episodes of Macroscopic hematuria
over last one year.
This is associated with pain in bladder area .
Most probably this is due to severe Bacterial infection of the bladder.(Cystitis
As your C.T can and Cystoscopic examination are normal ,you need not worry at all. You have to take antibiotic as per culture report and ensure to consume more water.