I Have An Enlarged Prostate And Went To See My

I have an enlarged prostate and went to see my urologist about a month ago I see him every 6 months for a check up every time I see him I give him a urine analysis I have blood in the urine and he isn't concerned I just took a blood test last week and a urine analysis when I saw my family doctor. Now he wants me to get an ultrasound of my kidneys and bladder and an ultrasound of my upper right quadrant I have had kidney stones and I'm wondering if this could be serious I have no pain,