@donotringatme,
It's interesting you ask about eustachian tube dysfunction. If you're referencing back when I originally got tinnitus in 2015, no, ETD was never brought up. But I did have fluid in both ears and had a lot of pain and pressure bilaterally, which they attributed to the fluid. I should say that a few days before the ringing started I had attended a very loud AC/DC concert without earplugs. Never had any clue of the damage we were doing to our hearing when we went to these concerts. My hearing at the time however, tested completely normal.
Presently, one of the things that I experience predominately in my left ear is a lot of pain and pressure. Quite frankly I think it's worse than the ringing.
I was absolutely convinced that I had fluid in my ears again, but alas, my ear was fine. I know that aural fullness can come with hearing loss but my ENT said my hearing loss is so mild he can't imagine that has anything to do with that. He's more inclined to agree that there's something malfunctioning with my eustachian tube or it is TMJ related. I'm a clencher and boy I feel it when I wake up in the morning. I have found that my nasal antihistamine and a steroid spray has helped with that pain and pressure in my ear a lot. My ENT also told me they can't really see your eustachian tubes so they don't really know if it's the cause or not. It's more deductive reasoning.
I hope we both improve soon.