Bundy,
Most important is what your doctor says at your followup visit. Be sure that she has a copy of the hospital scan report.
From your statements, you have had microscopic blood AND visible blood in your urine, since last year. Doctors have apparently not identified a cause. Your current doc needs to see the hospital report and decide if a further work-up is required.
It appears that you may have a kidney stone and a cyst that may or may not need to followed.
No need to freak out, but follow up appointments with your doctor, given the history you stated, is the only way to determine if the blood is a minor or major issue.
Best,
Jack