You are right it is your adrenals because you autonomic nervous system gets out of balance and you get "stuck" in sympathetic(flight or fight) mode. I deal with this from time to time also. Magnesium is a hugh help and also supporting the adrenals with vitamin C and B complex. I think I get this way when my fluid levels drop also. Low blood volume makes your body make more adrenaline (trying to get the heart to pump that blood around faster) So make sure that you drink enough water also.

Good luck