Welcome in H.C.M. for query.
I read your query, after considering all facts and symptoms it appears as infective pain in nose and throat and reaching up to ear via eustachian tube.
To find out the exact pathology and site of lesion you should do-
1- C.T.scan of paranasal sinuses
2- Culture & sensitivity of throat swab.
3- Blood - CBC, ESR
, blood sugar ( F & PP).
By these investigation and a thorough examination one may reach to a final diagnosis that may be accordingly manage.