I have no glucose in urine and a normal random blood glucose. could i still have diabetes?

Yes: The diagnosis of diabetes is not usually made or excluded based on a urine glucose or a random blood sugar. If you are concerned that you may have diabetes you should see your primary doctor for proper assessment which may involve doing a fasting blood sugar, a hemoglobin a1c - which looks at average blood sugar over the last 3 months, and/or an oral glucose tolerance test.

Yes: Fasting 100-125 = prediabetes, 126 and higher = diabetes or , 2-4 hours after eating 140-199= prediabetes, >200 =diabetes.

Probably not: Usually diabetics out of control will show glucose in urine. You can still be a diabetic but showing glucose only when u have a high glucose intake. Only way to prove you are not diabetic is with a glucose challenge blood test and a hemoglobina1c blood test. There are diabetics contrlled with diet and others that require insulin.