Re: what is PRE-diabetic??
Type I diabetes is a disease, you either have it or you don't. Type II is more of a spectrum. Pre-diabetes means that your test results (some sort of glucose test, I assume?) Anyway the test results are worse than normal, but not bad enough to count as diabetic.
Pre-diabetes can sometimes be reversed through lifestyle changes. My brother-in-law did. If you are overweight, carefully try to lose the excess. If you don't exercise at least several times a week, start doing that. You also probably want to make some changes to your diet, minimizing sugar and white starch, eating more whole grains and vegetables.
Speaking to a doctor or nutritionist about the best way to start these changes is a good idea. Try calling back your current doctor and asking for advice on what to do now. If you get nowhere, then, definitely, different doc time.