Hi allautumn,
For the tinnitus I used to tune an FM radio between stations and just listen to the 'shushing' sound instead of the tinnitus noises. Eventually my brain got used to ignoring the tinnitus and now I don't need to do that.
With the intrusive worries I try to think of something I like, maybe church plainsong, and imagine I'm listening to that instead of the worries.
I know this is small stuff compared to what you are going through, but I wonder if the principle is the same? If all the commotion is going on inside our heads, would it be possible to attend to something else and gradually retune ourselves away from the 'jungly' sounds that are so upsetting?
Sometimes, I imagine that I am looking after an irritating child, who keeps jumping on me and prodding me. With great effort I ignore the child and don't respond to it. Eventually the child gets bored with me and goes away or quietens down.
It's just visualisation but it has helped me.
I hope things get easier for you, Myzen