Hi I have an underactive thyroid but my TSH level on Oroxine is 18.4 and my TSH level is 4.5 which are ok. However, my Anti-thyroglobulin Ab is high at 201. Could this be the reason I still have symptoms of an underactive thryoid? ie insomnia, hair loss, cold intolerance, wrist and hand pain, brain fog, weight gain. Thanks