This condition of yours is called secretory otitis
media as a result of eustachian tube block. You need to consult your ENT specialist
and get your ears examined and also you require a tympanometry
to rule out the fluid in the middle ear. Till then try doing steam inhalation 3-4times/day, this will relieve the nasal congestion
and the ear block as well. Also, drink plenty of warm water and use saline nasal drops 3 drops 3-4 times/day.
Dr. Naveen Kumar