HI I have gone through your mail and as you said that you have upper respiratory tract
infection for last three weeks, you have nasal infection
,congestion and obstruction which had progress to involve throat leading to sore-throat and this ultimately lead to obstruction of eustechian tube which developed to ear blockade.you are advice to go for these investigations-((1) X-Ray paranasal sinuses
,(2) culture and sensitivity of nasal discharge (3) H.R.C.T. of ear (4) Pure tone audiometry
(5) Impedance audiometry. Now you are advice to consult your E.N.T.doctor for your clinical examination and co-relation of inferences of investigations so that your disease can be diagnose for treatment.Thanks.