thanx for your query
History seems that you could be suffering from attack of URTI with Eustachian tube catarrh and middle ear effusion
You need anti histaminics like levocet, mucolytic
drug like tab acetyl cysteine
Take steam inhalation, will improves mucociliary clearance.
Avoid cold and junk foods, smoking and alcohol.
Also do valsalva
manure i.e. try to expire by closed mouth, nose and glottis, will increase nasopharyngeal pressure and it will openup Eustachian tube.
Thanks, take care.