I would definitely not try to get disability based on adrenal fatigue
You have to go for something that they consider a real disease
You probably have more success going for fibromyalgia and/or chronic fatigue. Fibromyalgia now is definitely an "official" disease, recognized by the government, whereas adrenal fatigue is not. I wouldn't even mention it if I were you because they're going to write you off
You should contact a disability attorney in your area and talk to him or her about.