Dah I should have known that! So I am wondering if they did test your thyroid function in a blood test? I don't recall having any problems with my throat, like swallowing, when Hypothyroidism was caught in a routine blood test decades ago.
(I did have a lot of problems with it after my j-pouch surgeries. When changing my dose all the time because of testing results wasn't working they sent me to an endocrinologist.)