My doctor said I had a little bit of blood in my urine and wanted to retest. I retested, but the day before I had food poisoning and was very sick. The urine sample came back with 2 + (A) protein and 2-5 Red blood cells, and also ketones. I'm now doing the 24 hour urine test, but could my last urine test come back like that because of the food poisoning?