Burnout is not "working too hard". Burnout is "working too hard without meaning or recovery". It is a slow, insidious slide into collapse.
Psychologists Herbert Freudenberger and Gail North developed the 12-stage model. Where are you?
Enthusiasm turns into obsession. You want to show you are the best.
You can't switch off. You check emails on Sunday "just to get ahead".
Sleep is reduced. Eating becomes irregular. "I don't have time to cook."
You feel jittery. You blame the "traffic" or the "idiot clients", not your workload.
Friends? Hobbies? Boring. Only work matters. You become cynical. You detach from people.
You feel like a shell. Depression sets in. Physical collapse follows (adrenal fatigue, ulcers, panic attacks).
You cannot heal in the environment that made you sick. You need 3-5 days of zero output. No "learning". No "reading". Just biological existence. Sleep, Eat, Walk.
Your self-worth is currently tied to "Output". You need to tie it to "Input" (How well did I sleep? How well did I eat?).
When you return to work, you operate at 60%. Do exactly what is required to not get fired. No volunteering. No extra credit. You are in rehab.