Evidently your cystoscopy did not show anything abnormal. If it had, other tests would have needed to be done before a definitive diagnosis could be made. However, your bladder looked normal. As I said in my previous post, most of the time the presence of blood in the urine (your "black specks) has NOTHING TO DO WITH BLADDER CANCER. Yes, urinary blood can be a symptom of bladder cancer, but more often than not it is NOT bladder cancer.
You probably do not have bladder cancer, and your doctor is doing everything he can to make sure of that.
Beware of "Dr. Internet." Many sites are unreliable, and in addition those that are authoritative may not be easy to understand.
You will be fine.
Sara Anne