I really feel for you. I've spent over 10 years seeing numerous different doctors and specialists about my Chronic Fatigue Syndrome, trying to convince them that there is something seriously wrong with my endocrine system (there is).

The responses have varied from scoffing, to sympathetic but clueless, to thinking I must just be making it up because I also have a history of depression and anxiety (somehow, they think that means you're also delusional and a malingerer). I've also gotten the "you're a young man and you LOOK healthy; what could possibly be wrong with you?" response. It's SO, SO, SO frustrating. Apparently, if you're less than 40 and all your basic stuff like blood pressure is ok, it's not possible to have any other health problems; at least, that seems to be the default position of a lot of doctors I've seen.

Nobody takes fatigue seriously, because it's such a general symptom and doctors will often just trot out what seems to be the most convenient explanation (e.g. depression) without bothering to actually closely examine the patient, troubleshoot, and give referrals.

You might be able to get some helpful info from this website:

http://www.endfatigue.com/

Take care.