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The presence of microscopic hematuria
which is what you are describing may or may not indicate kidney disease. A kidney stone or any mechanical blockage within the urinary tract
can cause microscopic hematuria. Since you are menstruating, this may be confounded vaginal blood admixing with the urine specimen. To exclude kidney disease you would need: Blood chemistries to assess creatinine
and BUN, kidney ultrasound
, clean-catch urinalysis
and quantification of urinary protein excretion. Once your physician has the above data, they should be able to answer definitively if you have kidney disease or not.
What you had done is take an insurance physical which basically cast a large net "fishing for abnormalities" such that if there are any, they can deny you insurance or raise your premium. It is not a diagnostic test rather a screening tool.
Consumption of animal protein prior to the studies may have increased the urinary creatinine excretion but should not affect hematuria
Take care and be well