Some protein is normal in the
urine. A 24 hour estimation of
protein loss in
urine would be optimal to estimate the level of proteinuria.
Conditions which can cause proteinuria are nephrotic syndrome, glomerulonephritis, dehydration, collagen vascular diseases, strenuous exercises, diabetes mellitus, infections, multiple myeloma etc.
I would suggest that you repeat the urine analysis again and take the opinion of your urologist to rule out the conditions mentioned above.