Hi, thanks for using healthcare magic
Even though your T3 and T4 levels are in the normal range, if they are in the upper limit of normal which may be above what they normally would be for you, they would suppress the TSH
The TSH can also be low if the pituitary or hypothalamus
is not functioning properly but in that case the T4 and T3 would be decreased.
It may be best to follow your doctor's suggestion and see an ENT doctor, an endocrinologist
would also be helpful to you.
I hope this helps