The description of the sense of dizziness that you have sounds that it may relate to cerebellum function as one possibility or your position sense as another. It sounds to be neurological in origin.
I do not think that it related to inner ear as this would cause a sense of vertigo...so you would probably NOT benefit to see an ENT....
It does not sound to be the type of dizziness that causes a sense of light headedness. This type is usually connected with a sense that you may pass out but this does not seem to be the case either.
When you have the episodes are you clumsy in your walking or use of your hands? This would be consistent with something affecting the function of the cerebellum portion of the brain which is toward the back. This problem might be vascular in nature and you may benefit to have an MRA test. This is a magnetic resonance angiogram. It shows specifically the blood vessels in the brain.
I would recommend that you consult a neurologist further for evaluation of this problem. It may help to get a second opinion if you already see a neurologist. This increases the number of years of experience working for you and helps to have fresh eyes on a problem sometimes.
I do fear that your problem may remain difficult to diagnose and probably even more difficult to treat...
I hope this information is helpful for you. If you have further questions then please let me know and I will be happy to get back with you!!
If my answer has been helpful and to your satisfaction then please remember to press the "ACCEPT" button. Thank you and Best Regards,
Anthony Bray MD