i have had test for thyroid disorder but the dr says nothing is wrong. test range is .50 - 6.00 and my test came up .45. however i believe something is wrong as i have quite a few symptoms listed as symptoms of over active and underactive thyroid. the main one of concern was my hair falling out. others include: itchy skin, tingling in hands and fingers, lighter periods, dry eyes, depression, maybe nervousness. what could be the problem