AI is a salt wasting disease. I have AI - my sodium and potassium are always off when I am ill, and usually when I am feeling okay still at the upper or lower end of limits. I have to take a medication to hold sodium.
Yes, renin/aldosterone control the sodium/potassium system, but AI will lower sodium, and sodium will effect potassium.
But you can have a renin/aldosterone issue without having a cortisol issue as well.
I'm not a doctor but I thought one can still have adrenal insufficiency (secondary or tertiary) even if Sodium and Potassium are within normal limits as they are controlled by seperate systems?
Your sodium and potassium are in normal limits which pretty much rules out a cortisol issue. Not sure why you are drinking salt water.
Fatigue is a... general symptom. It can be attributed to SO MANY things that to just think it is specific to adrenals... just cannot make the leap. It could be a vitamin, another hormone, an auto-immune disorder or... anything!
Licorice root may only add to your fatigue.