Re: does your thyroid make you dizzy?
In my travels, I did see at least one study, with ultrasound images to confirm, that the thyroid can expand to the point of interfering with the cartoid artery.
I think you will also find that some Hypothyroid patients with normal thyroid size, experience some dizziness. Still think it's a "hypo-thing", just not sure what it would be in those cases. Mine is minor, but comes and goes.
My opinions only, not medical advice. Always follow advice of your Doctor, not what I say here.