The nodules can also be causing problems even with normal labs - especially if they are constricting any important neck structures (my daughter's was compressing her jugular).
Can you also post the results of your ultrasound (if you have had one)
Get a copy of your thyroid levels and try to post them here.
I was told for many years that my levels were normal. Come to find out, the endo has said I should have been treated for hypothyroidism years ago!
I also have vertigo that has improved greatly on thyroid replacement meds. Hair had also grown back.
Is anything going to be done for the enlarged pituitary or does the doctor have an explanation as to why it is enlarged?