Hi
The absolute first thing you MUST do is get your glucose under control. You are diabetic. I don't think there is such a thing as pre-D. It's like being pregnant. Either you are, or you aren't. Keep your carbs to 45 or less per meal, use your meter to see what a certain food does to your glucose. If its white, don't bite. Rice, pasta, bread, potatos. Fruit in moderation. Excercise if you can.

The supplements could help. I don't know much about them. I do know with good control your nerves can improve. *edit*