There definitely are things you can do, but in my experience when you feel this way it is really hard to do them.

I've been reading and listening to a few things that are helping me. One thing I've been learning about recently are the body's responses to chronic stress, such as the release of cortisol in the body, and the long term damage that can do. And about allostatic load, which helps explain how it gets perpetually worse as time goes by.

The author's experience is real of course, but it doesn't sound like she is an authority to discuss if it can be cured or not.