Brief Answer:
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Detailed Answer:
I read your question carefully and I understand your concern.

Dizziness is tough to evaluate as there may be many different causes at its root.

The fact that it is increased by sudden head movements and the previous issues with your ears make the possibility of an ear origin the most likely one. Usually the dizziness in this case is in the form of vertigo, a sensation of spinning movement. Nausea or vomiting, increase with change in head position are common as well. Usually symptoms are alleviated by antihistamine medication like meclizine.

Another common cause is neck arthritis. That happens because arthritic changes like bony spurs in the upper neck levels may affect the nerves exiting from there. These nerves are involved in balance as they provide information on head and neck position hence their compression may manifest with dizziness and nausea. Some neck pain or stiffness is a common associated symptom.

Apart from these common causes, one other cause to watch out for is stroke in the posterior brain areas. It is unlikely in your case as usually there are other symptoms like headache, double vision or other visual abnormalities, weakness or numbness of the limbs, difficulty coordinating movements, balance difficulties (usually more pronounce than with the ear, unable to walk unassisted) etc. So if any such issues appear you should present yourself at the emergency room.

Other possible causes may include infections, anemia, metabolic changes etc.

So if symptoms persist you should schedule an appointment with your primary physician for a physical to check for signs of ear or neck issues, or other possible signs you might have missed. If there is no indication for any of that some routine blood tests to screen for the other causes I mentioned or brain imaging if there are neurological signs may be done. If symptoms suggesting stroke appear as I said you should head to the ER right away.

I remain at your disposal for other questions.

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