From your description alone, these two tests are normal, and the conclusion of B-ultrasound has been clearly written. Why do you want to do the test?
First, do you feel unwell and ask for kidney color ultrasound?
Second, did you feel sick and went to the doctor to see the checklist?
Because the diagnosis of disease is not only to look at the examination report, but also to make a comprehensive judgment by the clinician in combination with your condition, past history and symptoms, therefore,
First, if you still feel uncomfortable, it means you haven't found the reason yet.
Second, you just don't feel well, there are no obvious symptoms, or you can't explain yourself clearly, so you should follow up.
Friend, I wish you health.