It is time to find another doctor. I have only been diagnosed with hypothyroidism for a little over a year. My condition is the result of radiation therapy to the face and neck. But, I do have my thyroid levels checked periodically to insure that I am on the correct dose of Synthroid.
Take it from me, please, if you are not satisfied with the care you are currently receiving, look for a new doctor. If I had not found the right doctors, I would not be communicating with your right now.