Hi, do you have any labwork done recently that you can share (besides the TSH) along with the ranges? You say your FT3 is "normal" but it really should be in the top third of range, not just "in range". Have you been tested for the antibodies for Hashimoto's disease?
Pain in the throat is a common symptom. Are you getting any treatment? If so what is your medication and how much are you taking?
If we have a little more information we might be able to offer some advice for you. Thanks