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.