Welcome in H.C.M.
I have gone through your query regarding recurrent labyrinthitis
as you faced two episodes of nausea & dizziness
As you said your gall bladder
had been removed about 5 years back, but i think this will not be the reasion of your dizziness. Considering your age of 66 years and the way nausea and dizziness appeared and responded to treatment it appears you are suffering from BPPV. Second possibility is of senile vertigo.
My suggestion is that you should consult ENT / NEUROLOGIST
for thorough examination and necessary investigations to confirm the diagnosis and treatment.