The symptoms as mentioned in your post suggest that you might be having Serous Otitis
media (Otitis media with Effusion/Glue ear)
In this condition...the middle ear cavity gets filled with serous fluid, resulting in congestion and bulging of eardrum
, sensation of pressure in ears & interference with transmission of sound (conductive hearing loss
Management is based on diagnosis by physical examination & tympanometry
So...it will be better to consult an ENT specialist
& get a proper physical examination done to find out the exact cause.
So that proper management steps could be taken.
Wishing you a Good Health. Let me know if I need to clarify further.
Thanks & take care.