Thanks for the follow-up.
As you have previous history of inner ear infection and you are suffering from cough,dizziness for last few months so your symptoms wouldn't go better by their own.
You may require proper treatment to relieve your symptoms.
You can try saline gargles and OTC Robitussin DM for cough.
And consult your ENT specialist again.
X-ray of para nasal sinuses,chest X-ray,blood work like CBC,ESR,Absolute Eosinophil count should be done in your case for further evaluation.
I hope this helps.
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