I'm sorry. I don't have any practical advice, but an Italian singer I like (Caparezza) developed it ~10 years ago. He would go talking about his condition extensively in his subsequent albums (Prisoner 709, Exuvia and Orbit Orbit). The most explicit song about it is "Larsen". In fact, I'm going to a concert of his in a couple of months.
What I mean to say by this, is that if he managed to live with it, produce 3 albums and he's still doing concerts, I'm sure you can overcome this as well, and I hope you can take some solace in knowing the experience of other people.
Also, if you haven't done so already, go see a doctor. It's always possible that it's temporary or that it can be slowed down.
Also I think my mom used to have a milder form of it, and other than turning the volume up on the TV, I don't think she ever was too bothered by it.
