Hello,
Thank you for your query at DoctorSpring.com
I understand your concern.
In all probability you don't have anything in your bladder and you don't need cystoscopy.
However, you should undergo CT urogram and urine cytology to rule out anything major.
Once you have the reports, kindly get back to me and I will guide you further.
Take care
Sincerely
Rajiv Goel