I was diagnosed pre-diabetic initially with a 101 fasting reading. Since then I've changed my food selections and for a couple of months almost never go over 25-30 carbs per meal. Although only 95 pounds and no weight to lose I am exercising more. My last fasting reading was 84.
I have done random monitoring at home with glucometer and if I eat over 30 carbs I've found my 2 hour post is in the 125-150 range. I thought that might mean I was insulin resistant so asked a new doctor about it. Asked him about doing a GTT. He said I'd get a better dx with a fasting glucose/insulin ratio test which he did.
I have not seen the actual numbers yet but he did tell me it was normal.