Tired all the time? Could it be Adrenal Fatigue?

Do you think you may have adrenal fatigue? I think I may have it, although for me it would probably be more of a downstream consequence of PCOS and candida. In general, if you are tired all the time and have to drink a lot of coffee, caffeinated tea or other stimulants just to get by, you probably have adrenal fatigue. This is what this website says:

Adrenal Fatigue affects an estimated 80% of people living in industrialized countries at one time or another in their lives, yet it has been ignored and largely untreated by the medical community. As a physician in private practice, the number of patients I can work with is limited so, in order to reach the many individuals who suffer from this problem and help them regain their health and vitality, I wrote the book Adrenal Fatigue: The 21st Century Stress Syndrome.

Here are some more links to info about it:
http://altmedicine.about.com/od/gettingdiagnosed/l/bl_quiz_adrena1.htm
http://www.lammd.com/A3R_brief_in_doc_format/adrenal_fatigue.cfm