Hi welcome to HCM
Dear ,I can understand your concern for 
adrenal fatigue .
Adrenal fatigue can be caused by a number of factors, including 
stress , lack of physical activity , lack of nutricious   diet, physical and emotional trauma
In fact ,your weak immune system due to   faulty food habits and derailed   life style is responsible for this condition of yours .
Gulping on on;ly medicines will not help cure unless you modify your life style and food habits . 
 Avoiding Tea , coffee  , alcohol , 
smoking , dehyderation , sedentary life style, is  the best approach  , to strengthen your immunity .
 Make solid changes to your lifestyle for lasting results. If you aim for a balanced lifestyle with including nutricious food - fiber , vitamins ,minerals ,  and antioxidants in natural form  like amla , lemon  fresh green veges & fruit , 
Aloe vera juice , coconut water  ,  lot of water to detox your system . 
Proper rest ,  healthy level of sleep, 
meditation  , pranayam - Deep Breathing  - Inhale - Hold - Exhale - Hold  for 10 -20 times ,  
yoga , exercise, fun and positive environment   will lead you  most likely to keep your adrenal system going strong .  
It may take a month to 3 monthes to recover . Gradualy you come to normal stage .
If you still feel you should consult a competant physician for 
second opinion Hope this helps sove your query . Take care all the best .
 Dr Suchda