When low body temperature like yours not much in the body will work, and fluoride may well be one of the causes for this. All typical for hypo T.
I would start with focus on your digestion; vit B and zinc are needed + magnesium (citrate or malate)+ digestive enzymes (enzymes work poorly at low body temperature)
Full Iodine protocol with selenium,real salt and vitamin C. Virgin Coconut oil; spoonsfuls daily for energy and warmth.
here is the link to the Iodine answers; //www.curezone.org/faq/c.asp?a=13,281,2962
My adrenals have healed along with my thyroid, the only extra I take for this is liqorice root powder.