I actually do have a thyroid condition, Hashimoto's Thyroiditis. It took me forever to figure out what was wrong with me. I want from doctor to doctor to doctor and none of them could find a thing wrong, and some of them even insisted that my constant muscle pain, weakness, insomnia, tension and heat/cold intolerance were normal and/or all in my head. It was a godsend when someone finally thought to check my thyroid, and now that I'm on meds for it, I'm a new person.