some of the info hver gave is good, some is off the mark.
here goes my .02, but i need more info from you to help
~Complete & Utter inability to gain weight or muscle
either malfunction of small intestine, malabsorption, gall bladder issue, incorrect diet.
what is your blood type?
i have helped several people gain weight and muscle. what is your diet like? any candida or fungal issues? history of Antibiotics ? history of dental work? any other info you want to add?
the first and obvious is that you eat no meat. i won't debate the issue of vegetarianism just yet, but if you are open to it, you might want to add in some animal protein. there are different ways to do this, but for now anything that you can stomach and that you feel you can digest. eat small quantities at first.
consider the Blood Type Diet , primal diet, or ayurvedic vata constitutional diet ( assuming you are underweight)
i knew a guy who had lost a dangerous amount of weight after having his gall bladder removed and he gained it back using stanley bass's sequential eating program. avocados did the trick
it would also be very difficuly not to gain muscle on the primal diet.
~Hives on skin when scratched
hives are related to intestine and liver toxicity.
~Loss of skin pigmentation (small patch)
yes related to hypothyroid as hver said, but there are many routes to correct this. some basic things would be increase efa's like cold pressed flax oil, or unheated fish oil. Liver Cleansing will also help this a lot. Liver Cleanses are for real as you know from experience. don't overdo them though and stress out the rest of your organs.
~Acne, utmost certainty triggered by any sexual activity; loss of vitamins?
weak sexual glands... natural zinc is what you need. raw pumpkin seeds, fresh raw oysters, clams, ceviche, or vegetarian sources that your body likes.
Acne is also an intestinal/liver toxicity issue. look into waisays.com she has some good Acne specific information.
~Stomach/Intestinal general area pain
where exactly is the pain. under right ribcage would indicate gall bladder issue.
~Loose fatty stool
fat is not being digested... gall bladder problems.
~Dark circles under eyes
kidney, liver, and or intestinal toxicity.
~Food passing too quickly (8-10 hours after eating)
not sure if 8 hours is too soon. try eating heavier foods.
3 months is not a lot of time in the grand scheme of things. i don't know what a candida cleanse is.
... more later after you respond.
What I have done:
6 Liver Flushes
1 Candida Cleanse
2 Colon Cleanses
(Above avoidances have been continued for at least 3 months each and/or together)
(Minor Things; ACV, Coconut Oil, Multivitamin, ect.)