Can symptoms of nondiabetic renal glycosuria happen only in the evening? (invert sleep cycle too) see nephrologist soon, +ketostix urine=sweet smell

This doesn't add up. Non-diabetic renal glycosuria (i.e., the kidney spills glucose despite normal blood levels) doesn't produce symptoms. Urine odor doesn't reflect glucose levels at all reliably. Ketostix often yield +1 for no reason, or because you're hungry. With dysautonomia and gastroparesis, is there perhaps a misunderstanding, with diabetes a possibility? You have a right to full information.