Thyroid function can be diminished, even though
blood test results are
in the normal ranges. If your results were low
in the ranges, you could still have symptoms. Same goes if you have Hashimoto's Thyroiditis, which is an autoimmune thyroid condition, in which the body destroys the thyroid. With Hashimoto's, it's very common for symptoms to appear before blood tests go out of range. Ask you doctor to test you for thyroid antibodies.