Hello. Thanks for posting in HCM. Hypothyroidism is known to cause to weight gain and increased lipid saturation in body. If you have already done thyroid study and have found to have such a high levels of TSH with low levels of T3 and T4 it clearly indicates the presence of hypothyroidism. You are required to start on thyroid supplement in form of levothyroxine every day once a morning. It will provide the deficient thyroxine and help to keep thyroid profile within normal range which ultimately will cause you to get your weight under control as you are already doing exercise and diet control. Advisable to consult your doctor and to be started on thyroxine supplements and do regular follow up to check you thyroid profile from time to time to see whetherthe given dosage is working for you or needs optimization. I hope i have answered your query well. Thank you