Thanks for posting your query.
may be viral or bacterial in origin.
and middle ear are connected by eustachian tube and infection may spread up to middle ear.
Nasopharynx is also connected with sinuses
by their ostia and occlusion of ostia may also cause accumulation of fluid in sinuses and pain.
You should consult with physician and ENT surgeon and should get your PNS x ray
You should also get thorough check up of your middle ear.
You symptoms appears to be due to involvement of middle ear and sinuses.
Dr. Mayank Bhargava