Has anyone managed to recover from а serious burnout without taking a sabbatical? How?

I've noticed (with the help of family members and my SO) that I've become very negative, cynical and drained lately. Reading about burnout, I find all of the symptoms to be true for myself.

My job requires me to work on a single project full-time, and a couple of small side-projects. The management of the project is very chaotic and I feel more and more inadequate for my position. Priorities constantly change and just looking at the week's schedule in Monday, I can tell the we're not going meet the set goal by Friday. It has been like that for more than a year. It doesn't help that I've become very pessimistic about the main project's future.

Outside of work, I don't have much free time. The little I have, I try to spend with my loved ones. Hobbies and other interests are on the back burner.

As the title implies, I don't have the option of quitting or taking a sabbatical at the moment.

I know kbin is not a replacement for therapy but I was just wondering if anyone has been through this and found anything helpful other that distancing from their current workplace.