Natalie, the chances that your tinnitus is actually dangerous to your health is incredibly unlikely. talk to your ENT. If your tinnitus is unilateral (only in one ear, or much louder in one ear), then you should ask for an MRI. That will rule out an acoustic neuroma, which is a non-cancerous tumor growing in your middle ear. Let's be clear, this is incredibly unlikely. But to be safe, and to make yourself feel better, this is something that should be examined, IF your tinnitus is unilateral.
It is possible that your tinnitus is treatable. That you have something like Eustachian Tube Dysfunction, and that you have fluid trapped behind your ear drum. This would usually be accompanied with some loss of hearing or muffled hearing, b/c your ear drum isn't moving properly. Your ENT or audiologist will likely test your hearing and look at your ear drum and test pressure in your ear to rule these things out.
Once you've done the above two things, i.e. ruled out that your tinnitus can be cured, and rule out that your tinnitus is dangerous to your health, then you've gone a lot of the way with what doctors can do for you. From there it's mostly learning to cope with it, which helps toward habituation (I currently have a tea kettle going off on my right ear that I haven't heard in about an hour until I just listened for it while typing this to you...) If it doesn't go away, or cannot be cured (let's hope for both of these, but plan for them not happening)..., you're going to be fine either way. Frankly, it was 4 or 5 months before I started feeling better. And it's just taken off from there. You'll get there too, if need be. Let's hope you don't have to. But if you do, then know that you'll be ok. If you need anything else, let me know.
Good luck,
Eric