Do you have the actual results of the tests the doctor ran? if so, please post them with reference ranges as they vary from lab to lab!
Your symptoms do sound as thyroid related but again we need to see your results since only being in the normal range does not necessarily mean that this is proper for you, the tests that are recommended to monitor thyroid function are TSH, Free T3 and Free T4.
If these tests show hypO or hypER then the next step is to test TPOab and TGab for Hashimoto, and TSI for Graves, these are autoimmune diseases.
If you are hypOthyroid then the medicine prescribed is Levothyroxine with brand names like Synthroid, levoxyl, Eltroxin ... .
Post Edited (hypoHashimoto) : 1/1/2013 11:39:32 AM (GMT-7)