Some doctors only test for TSH, and diagnose based on that. That simply doesn't work. TSH is a pituitary hormone that is supposed to reflect levels of the biologically active thyroid hormones, Free T3 and Free T4. In actuality, TSH cannot be shown to correlate well with either Free T3 or Free T4, much less with symptoms which are the most important consideration.
If the doctor went beyond TSH testing and tested Free T4, then he most likely used "Reference Range Endocrinology" and told you that any test that fell within the reference range was adequate. That is also very wrong. The ranges are far too broad to be functional for many hypo patients. Free T3 and Free T4 results in the lower half of their ranges are frequently associated with hypo symptoms, which include low metabolism.
And speaking of symptoms, please have a look at this listing of 26 typical hypo symptoms and tell us about any others that you have.
http://endocrine-system.emedtv.com/hypothyroidism/hypothyroidism-symptoms-and-signs.html
If you will please tell us about any other symptoms, and also post your thyroid test results and reference ranges shown on the lab report, members will be glad to assess the adequacy of your testing and diagnosis.
I also had my thyroid removed in 2000 and the weight gain is unbearable. I was never over weight until this surgery. I am also very active and don't over eat. No one can tell me it isn't the surgery. I feel your pain and I have no idea what to do. My Doctor just checks my med levels and says they are ok.
I too had thyroid cancer .I am on synthroidand cytomel.I take walks for art least 30 minutes.Just taking a walk will help you in the losing weith dept.Doesnt have to be strenuous,.just a nice even paced brisk walk.
Good luck Venora
Is the weight gain something new or did it start in 2000? Have you checked your levels lately? Maybe you need a new dose for your Synthroid? I just had mine removed 3 weeks ago and have lost weight due to no appetite.