I have an undiagnosed progressive neuromuscular disorder.  Might be mitochondrial myopathy or channolopathy. Whole exome pending. Will come back in few months. May not give answers. Also found to have sick euthyroid. My severe cold intolerance from past several years somewhat better on levothyroxine. I am on it for about 3 months but I have lost no weight. Gained about 25 lbs in last 2 to 3 years. Cant exercise because of neuromuscular disorder and ventricular tachycardia.  Am pretty upset. Dont know what to do.  Little direction from medical professionals.
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