Welcome to Health Care Magic
You seem to be rather anxious!?
You can ask anything - but the doctor may not comply! - he has to be convinced...
You have to look at simple and common things first - like anaemia
and Ear problem. Check your blood pressure. See blood sugar, have an ECG. If there are no clues and still you are suffering, then Neurological opinion and MRI+ MRA will be a god idea.
Wishing speedy recovery