I have had many of your symptoms: extreme exhaustion, cotton mouth, sores in mouth and on tongue, aches, falling asleep at any time, explosive diarrhea, hair loss, etc., etc.
The diarrhea was caused by IBS. The hair loss and some of the exhaustion by hypothyroidism and also a secondary adrenal insufficiency.
The falling asleep anywhere, anytime by the fact that my then doc REDUCED my thyroid meds by half--then he put me on Nuvigil to keep me awake!
It is possible to have a galaxy of auto-immune issues that all overlap, and therefore you can't really tell WHAT is causing what!
I am now 63, and started getting the adrenal and thyroid issues when I was 44. The IBS I've had since my twenties.
I have been to any type of 'traditional' medical doctor you can think of!
I have also gone to nutritionists and alternative medicine practitioners.
I have also done extensive reading on all of the above (which was not easy before the Internet!).
No one could pull everything together!
I KNEW it was hormone related.
Finally, I just found a new doctor who has a specialty in FUNCTIONAL MEDICINE, where he treats the WHOLE body, with a sub-specialty in HRT.
He has told me that I will never be able to get well until ALL my hormones are in balance. At that point, I should be able to get off of my blood pressure meds. He does NOT believe in things like Lipitor, but rather taking good quality fish oils, vitamin D and niacin. He discovered that I was on too HIGH a dose of hydrocortisone (for my adrenal insufficiency), and cut it in half. He thinks that I will eventually be able to get completely off of it, even though I have always been told that is impossible! He DOUBLED my bio-identical thyroid meds, as they were too low--- even though the standard tests my previous doctor took showed me to be in the 'low normal' range!
He has also put me on bio-identical DHEA and Progesterone, Again, my previous docs had said I didn't need Progesterone, as I had had a complete hysterectomy, and only needed estrogen replacement!
I'm sorry to go on and on, but I wanted to show you that there IS hope... but it is extremely difficult to identify what is wrong when you can have so many issues on top of each other!
I have also been treating with a homeopathic healer since 8/09 and taking her rememdies. She described it like peeling back the layers of an onion--you fix the newest problems first, and work your way down to the oldest and worst! When my current doc did a Spectracell blood test on me, I was in good range for ALL my vitamins, minerals, anti-oxidents, etc., and he credited her treatment with getting me there (with her nutritional supplements). I have NEVER had a doctor who even UNDERSTOOD what a homeopathic person was doing--much less approve!!!
Sorry to be so long-winded, but I wanted to let you know that there ARE others out there with similar problems who have (finally) been able to see the light at the end of the tunnel and have hopes of coming out into the sunshine at the other end!
Good Luck to you. If you would like to send me Private messages and ask more questions, please "Friend' me.