GFR in the normal range is normal.
You not stated you have an elevated creatinine. A normal creatinine on a spot test, however, does not indicate normal kidneys, necessarily. Your normal ultrasound goes against medical renal disease.
There is no indication for kidney biopsy at all here. The risk would far outweigh any benefit and it would be thus dangerous do to at this point.
Increased creatinine does not cause increased protein, although they often occur together.
The indicated test here is a 24 hour urine collection, NOT anything else.
This will give an accurate creatinine , protein and GFR.
Ask for that.
Your dip stick tests are not totally accurate on any of these parameters, and an eGFR in the normal range, even if low normal, is not indicative of a problem.
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