Hi..
Welcome to HCM..
I have gone through your query and can understand your concerns..
As per your complain plugged ear after middle ear infection is due to accumulation of fluid behind the eardrum and also
blocked Eustachian tube..
Secondly dizziness especially when looking up or lying down can be due to middle ear infection only while there is also a possibility that the infection has progresses to inner ear leading to
Inner ear infection and can be a cause for dizziness on changing posture..
Sinus congestion can also cause persistent ear infection due to
post nasal drip..
I would suggest you to consult an ENT EXPERT and get evaluated investigations like Otoscopy can be done by him and can also advise you MRI scan,
Tympanometry, Audiometry etc for confirmation of cause and treat you accordingly..
As of now you should avoid sudden jerky movements of neck, be slow and steady..
Once the diagnosis is done you can be advised medications like antibiotics, decongestants and
Betahistine therapy..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.