Protect your hearing at all times. Even cinemas are dangerous these days. I carry ear plugs anywhere there might be significant noise.
Even in aircraft, I plug my ears slightly, then turn up the volume a little bit. It really does help the signal to noise ratio.
Right now, you have hearing at the important range for flying.
I feel you should see a specialist. There might be some infection that's treatable.
Do you have any high frequency whistle/tinnitus? Any vertigo? (lateral visual effect.)