Free T4 of 1.1 is normal, are sure they measured free T4? where did you got those values (4.5-11)?
Ferritin is your iron storage, 13 is low for a man, but how is your Hb levels (hemoglobin), RBC count?
If you have nodules, multiple nodules are better then having only one (one is always suspect), so you must talk to the ENDO (if they measure more then 1 cm). Most of your symptoms (not the weight) probably are related to anemia. You must explore that, why you have anemia?