Hi,I Am 38 Years Old Female And For Past 14

Hi,I am 38 years old female and for past 14 years I am on thyronorm 100mcg.My TSH is sometimes on 2.5 or 1.25 but my endocrinologist never reduces the med.I do exercise cycle burn calories 1000 in 1 hr 30 min.I have reduced only 2kgs in 6months.My height is 5.1 ft.My hair has become thin n breaks I have got cervical too. Please guide me if I am on right track.