You know those songs that get stuck in your head? Try as you might, you cannot get them out of your head. Burnout is like that. Once it is in your system, getting it out is a task.
The advice that worked for me came from a TED talk: • Emily Nagoski and Amel...
...and Richard Feynman's book.
If you let that burnout settle, it will make itself home. Complete that stress cycle. Learn to do things for the fun of it. Deal with that burnout, ya?
It hurts you on so many levels.