I am curious if I may have a thyroid problem. I had a blood test that came back normal. Is there a more intense test that can be done? I have muscle stiffness and cramping, sore throat, sometimes I sleep a lot and seldom but occasionally I don t sleep all night. I have been to a throat doctor and he removed a cyst on a vocal chord, but I have not noticed any difference. My voice has changed, too. I have had grave difficulty losing weight, as I quit smoking and gained way too much weight. Thank you.