I, too, had all the symptoms (passing out, fatigue, weight loss, low blood solium, high blood potassium, etc) but normal ACTH stimulation test so I was sent back to the family dr. Nine months later I tested low for aldosterone (cortisol was still normal) so my dr. started me on prednisone and Florinef. So, don't give up-- sometimes the symptoms appear long before the lab tests show Addison's.