Hello
Welcome in H.C.M.
I read your query and also analyse your doctor's advice, as per specification of your
dizziness for a moment, it appears to be
vertigo or a variant of minier's disease.
As your
MRI of brain is OK it means no central lesion is suspected. You are advice to go for good neurological examination by
neurologist and investigations for vertigo like ENG etc.
You have not mention about your hearing and ringing sound in any ear as these are important for making diagnosis.
With Regards.