I had this, and so did a few friends of mine. One of them for better using a nebulizer with hydrogen peroxide. If you're interested I'll provide specifics.

I'm a big proponent of that as it helped me with Covid, and a number of small colds & flus, but it didn't help me with this. But then I got over it with an even easier home remedy ... gargling warm salt water twice/day for a week. Between 5-10 minutes, as hot and as salty as you can stand. It came on and off again for over a month before I got motivated to do that, but after I buckled down and put some discipline into it, no problem.

Hope that helps. God bless.