DO NOT FLY.
There, I've said it. DO NOT FLY with your current condition as described. Call in and say I can't fly due to illness, but I will come in and scrub the floors if you like.
There, you get to kiss up to management and still protect YOUR MEDICAL CERTIFICATION. WILL your airline pay you forever if you can't fly due to losing your hearing?
I didn't think so.
OH and for those who are up in the air with a BLOCK. In your flight bag keep a bottle of AFRIN Nasal Mist. Squirt it in your nose until you can feel it going down the throat. I MEAN LOTS OF IT>.
This MIGHT get you DOWN if you are trapped aloft with blocked eustacian tubes.
HOWEVER, you may only do this once and get away with it, unlike spandex masher who bled.
Using the valsava technique (pinching nose and blow) may help, but it may also spread infection deeper, and cause other problems.
IF you are home, take a nice steamy shower, it may help open you up.
BUT IT TAKES TIME AND YOU ARE NOT FIGHTING THE BATTLE OF BRITAIN.
Your spitfire squadron will not be upset with you.