I'm not allowed to send private msgs yet--only after 50 posts (maybe I should spawn off a bot), so ...
If you are diagnosed as pre-diabetic and you haven't had it I would suggest asking your doctor for an a1c test. From the American Diabetes Association site: "The A1C test measures your average blood glucose control for the past 2 to 3 months."
If he or she says it's not warranted now because you haven't yet been diagnosed with diabetes, just pre-diabetic, then I would say something like "I want to be sure".
If you dr's diagnose of pre-diabetic was based primarily on your glucose level at the immediate time you had your labs it can be misleading.
If others don't think the test would be worthwhile, I'd definitely be interested in hearing. Thx.