Just dropping in my two cents, maybe it will help a little...
When I first got tinnitus it was high-pitched like this, I measured it at around 15,250 Hz. And yeah, it sounded just like the high frequency noise that old CRT TVs make. (My hearing also maxes out at around 16,000 Hz.)
I fought with many of the same things. I latched onto it hard (OCD). I had nights where I barely slept. I spent a lot of time crawling around the Internet, looking for anything that could help me get rid of it. I used masking sounds (crickets and rain/flowing water helped for me). I battled depression for the first time in my life. I had days of terrible appetite and lost weight, and I had a hard time focusing on anything other than the dreadful sound and the bare minimum that I needed to do to make it through the day.
I did manage to get past it. The tinnitus seemed to get steadily louder/worse for the first three weeks or so, then it leveled off and started to get gradually better. It's hard to describe, after going through a lot of strange sounds it settled on less of a hard tone and more of a soft one which makes it easier to handle. (I've read that this happens to lots of people but it takes a few months.) At the same time, I started to adjust to it. I was able to stop masking after seven weeks (though to this day I still listen to white noise at night). It was about five months before I realized that I could go though a good part of the day without even thinking about it. It's like, after being so focused on it for so long, my brain eventually got bored with it; it became "normal" and I was more easily able to unconsciously set it aside.
In the almost 1.5 years since it started, the noise has calmed down a lot but has never left. Still, I'm able to get through the day without it bothering me at all; when I do notice it, the anxiety that I used to feel doesn't crop up.
In the end, I hate to say it but you'll have to wait it out to some degree. Getting past this mostly takes time, there are no shortcuts (though doing techniques to improve your mental disposition can help get things moving along). I'm a guy who never thought that I would be able to get over this when it first happened to me, but somehow I did it anyway. Yeah, given then choice I would totally prefer to have it go away completely, but the thought of living with this for the rest of my life seems like no big deal really. (Though in the end I am glad to have gone through this learning experience; as rough as it was at first, I think that it has steeled me for the next time something happens, don't know what that would be...)
I have a post in the success stories section with more on how it went for me and how I coped with it, if you think that it might be helpful at all, there is a link in my profile.
Thanks for that. I did read your success post, it was very insightful. As I read, I was really hoping that I could do the same, but as I sit here now, it is impossible to be positive.
I definitely have traits of OCD, as you do. Which I don't think helps.
This morning and this afternoon, I felt a bit more positive. When I am out and about it, I can't hear it. I came home, put the TV on and I just couldn't not hear it.
I used to love coming home and popping the TV on and relaxing. Now I just think Ill never be able to enjoy anything like that again... it might be catastrophising but I'm not sure if I am.
It got really loud and annoying that I had to turn the TV off. I've come upstairs and sat in silence.
The lower tones seem to disappear themselves, and they arent loud anymore anyway. They come when I listen to music but then go away a few minutes after.
But this really high pitched hissing is driving me insane.
The only way to describe it is like someone has turned a TV on but it's muted. I walked into my house last night and I genuinely thought id left the TV on but obviously I hadn't. It just sounds so loud and I can't not focus on it.
The thought of going to bed every night and battling this makes me feel sick. The thought of having to make big lifestyle changes, like listening to masks every night, makes me feel sick.
Which is why, quite simply, I was suicidal yesterday. And that feeling is coming back a little tonight. The sun has gone down, im at home, its quiet, and I'm alone with it.
I'm 26, do I want this forever? This constant nervousness and anxiety. No I don't. It's just not living, to me.