First, you need a good audiological evaluation to determine the extent and kind of hearing loss.
Did you indeed have an infection (usually painful) that required antibiotics? Often the middle ear will remain pus-filled for weeks or months after the infection has cleared. If it's clogged and resists drainage, it's possible that your eardrum might need to be opened to clear it. But it probably WILL clear spontaneously with time. Long hot showers, a humidifier for sleeping and patient long term decongestants (Sudafed-[OTC generic pseudoephedrine at $$Dollar Stores] perhaps) might help....Maybe 25-50 mg/day?
But get that diagnosis first...if your ENT won't give you one, call him names and then see somebody GOOD!
I actually called an old ENT a QUACK and much, much more to his face once- it's very satisfying. This man might as well have been named DONALD! I correctly diagnosed otosclerosis and wanted surgery (this was soon after they had devised stapedectomy) because I was going deaf but could hear my humming wristwatch LOUDLY through my teeth but not my ears...he diagnosed that my "eardrums were 'red as meat' and I'd need 6 months of thrice weekly throat sprays of gentian violet BY HIM"...like a $million$ dollars worth???
I said, "What about otosclerosis?" He said "Yeah, you could have that too!!!"
That's when I BLEW UP!
That was 30 years ago and I remember it like it was yesterday...it was THAT satisfying