I have been reading a motivation book called, "Get anyone to do anything" or something like that. In it, the Doctor had a small paragraph on Stress disorders (i.e. Panic Attacks, Depression, etc.) can be leviated by being on a low carb diet.

I left the book at home, but I will repost it here tomorrow.

Anyway, my point is by stablizing your insulin, it helps to even out your mood.

The advice from the others are sound, you should contact your doctor and let him know that you are on this diet and he might need to adjust your medication.