You haven't lost 30dB that is a lot, you've lost 20dB - the base line is at -10. You have also only lost it above 2.5K where it starts to drop. most people won't notice a 3dB drop, and yours is selective deafness, not across the board. Speech is centred around 300-3K, so this is why you don't notice it.
You'll also be favouring your better ear. Your brain does this for eyes and ears. It notices before you do and compensates. In your case, it means that localising lower pitch sounds works well. But a higher pitched sound you will struggle to determine location without rotating your head, which I bet you've started to do subconsciously. My guess is that its gone for good but at 32, hearing does sometimes return a little, but once those little hairs on the inside of your cochlea are damaged, they are gone for good. If your drop in performance is something that a surgeon can fix, then maybe it's worth investigating. I guess the audiologist would have looked in the ears and warned you if they could see something?
You can devise your own more musical test. The intervals between test tone frequencies on these tests are pretty far apart - they rarely test between them. They don't test above 8K, so harmonics are never checked for. You can download some test tones and stick them into your DAW and with some good headphones produce a more accurate chart in terms of pitch and volume, but of course your system unlike proper ones is not calibrated, but ⅓ octave spacing of tones and an on screen meter to set levels can produce a better defined curve that will mirror theirs but be repeatable whenever you want. Just make a note of the volume settings so you can compare test with test and use the fader to determine the point you can hear it. then select another tone and repeat. Hospital style hearing tests are only interested in speech - not music. A hearing aid is programmed to have the reciprocal curve - so at 2.5K when your hearing drops off you apply boost. You can even try this yourself in any old DAW. My feeling as an amateur at this is that wearing the protection is now critical, to prevent further drop off, but to try to see if there is something you are doing that is speeding it up? 32 is a bit young for this kind of reduction, so could there be a medical issue? Infections of the inner ear, sinus issues and things like tinnitus mean If these tests were from an audiologist and not a doctor, then a referral to the specialists could be a good move. Of course, they'll say the other is is fine and it doesn't matter - but it does!