Did you see a doctor after that scary period of what you felt on Friday?
I'm not sure, but maybe it would be worthwhile to tell about it to an ENT. Just in case.
You are a long-time sufferer then. Much more "T Senior" than I am.
How did your tinnitus start in the first place back in '99? Can you attribute it to anything special?
Welcome to the forums! And I agree about the cure.