This is a great site that helped me understand that I was having thyroid and adrenal issues, and to find a doctor that would be willing to help me get the treatments I needed:
www.stopthethyroidmadness.com/If you wish to have more detailed information, search for Dr. Lam, adrenal fatigue. My computer is messing with me this morning and won't load the page so I can share a link - sorry.
Once you know that you have adrenal fatigue, you can treat even without a doctor if necessary - although it's much better to be seen by a knowledgeable doctor so that they can monitor your progress and help you with issues that can come up.