The doctor you are seeing is treating for a condition called thyroiditis
in which your thyroid gland is partly destroyed leading to release excess hormones in blood. The treatment of the condition is betablockers and steroids
. Another possibility is a toxic multinodular goiter
in which your thyroid gland is producing excess thyroid hormones from a nodule. The two can be differentiated by a scan called Technitium thyroid uptake scan.
The symptoms of thyroiditis will usually subside in 2-3 weeks of steroid intake. The symptoms may come and go. If it is not improving you should consult a doctor and he may suggest you the technitium thyroid uptake scan. If it is toxic multinodular goiter you may be started on carbimazole
and may require additional treatments like surgery or radio iodine
Hope I have answered your querry
Dr Ajish TP