I would start with testing from Metametrix (GI Effects stool test) and rule out any gastro infection.
I would boost the adrenal function with supplements (pantothenic acid, vitamin C, high quality magnesium supplement UltraMag from Source Naturals, bovine adrenal glandular, b vits, adequate sodium and potassium).
I would chelate the mercury out with ProNatura "Dentox" with either chlorella, zeolite, Modifilan. Make sure you cleanse the liver with cysteine or glutathione (liposomal) with a herbal liver cleanse along with choline (methyl donor).