I had it for 30 years. AME told me to see my GP who arranged for me to have a scan. That showed nothing so he referred me for a cystoscope (sp?) exam of the bladder. Sounds scary but it isn't 5 minutes and it's all done. The specialist who did it said the surface of my bladder was very thin which allowed microscopic blood cells to enter urine, Good luck and hope all will be well.