hi and welcome.
Thank you for your report and the query.
Looking at your reports provided,I can assure you its either related to your
urinary tract,or
kidney.
1.Regarding the urinary tract or bladder, I must say it can be an infection of the former.If you have any symptoms like burning sensation while passing urine,or pain at the site of urination(that's called
urethra),hematuria(blood tinged urine),fever,pain abdomen.
2.As your doctor said,kidney stones often show such kind of report,so he wants to rule out the kidney stones/bladder stones.I strongly recommend you to go for an
ultrasound as it would help you to know the exact cause for your hematuria.
You do not
need a second opinion,if you are sure about your symptoms,and have the belief in your doctors approach,because I assure you he's taking the right step.
Thank You
Stay Healthy.