Posted 2/22/2013 6:18 AM (GMT -8)
I would guess the "shaky" feelings could be hyperthyroidism, but possibly many other things also.
As far as the ringing in the ears, this could be completely separate. Most thyroid problems have an autoimmune cause. You can also get autoimmune tinnitus (ringing in the ears.) I'd suggest an evaluation by a competent audiologist, who will likely recommend an ENT evaluation. There are other things, such as auditory nerve tumors, that can cause tinnitus also.