So, I have two things to point out, because I think your problem is twofold, anatomy and psychology.
From an anatomical point of view, I cannot tell you how many times in the past fifteen years I've had batshit insane changes in tinnitus that show up seemingly randomly and suddenly, and then revert to baseline over a period of hours to weeks. So, I think it's much more likely that whatever is going on in your ear, your brain is going to figure it out.
From a psychological point of view -- look at what you're saying here: you've had a sudden change in your perceptual system, and you're already half assuming that it's indicative of a permanent problem that you're going to deal with forever.
Not only is that extremely unlikely, the thought itself is fundamentally irrational, it's a textbook example of catastrophic thinking, which is one of the basic cognitive traps that people (especially people with anxiety disorders) fall into.
Let me tell you a story about my wife; we did some extended travel a couple years ago. On one of the descents, one of her ears did not equalize. When we landed, her ear was muffled and painful, and when we woke up the next morning, she was still basically unable to hear out of that ear.
You know how she reacted to this? We just went about our day, went to a museum she'd always wanted to go to, and she was happy, relaxed, and enjoyed the trip even though she was unable to hear out of half of her ears.
You know how I would have reacted to it? I would have thought "oh my god! I broke myself!" I wouldn't have even wasted time thinking "my trip is ruined", because I would have already made the leap to "MY WHOLE LIFE IS RUINED!" -- and that's exactly what you're doing now, @Andersson.
It's not as though my wife hasn't had her share of chronic problems, too. She doesn't have tinnitus, but, we're in our 30s, she's had at least one problem that persisted for years and required surgery to even partially fix... no one gets a free pass. So, it's not safe to assume that she is only able to be blasé about sudden unexpected changes in her body because she hasn't encountered any sudden, serious changes in her health: she has! So, I am prone to catastrophic thinking, she isn't: and this means I suffer vastly more from run of the mill health bullshit than she does.
If you can stop catastrophizing and projecting yourself into various unpleasant futures which are almost certain to not ever manifest, then you will be well on your way to tolerating your current level of discomfort without actively making it worse than it needs to be.
The future will take care of itself. Bodies are remarkably resilient, because the world is (and has always been) full of millions of things that are trying to kill or maim you every moment of every day. Even if your condition were permanent, the way that you'd feel about it in six months or twelve months has very little to do with how you feel about it now, and a lot to do with how you choose to respond and react to the way you feel about it.
You're going to be fine.
