I'm completely burned out but I can't quit my job yet

I daydream about quitting every single day. But rent, debt, and health insurance mean I'm stuck for now. I'm running on fumes — making mistakes I wouldn't normally make, crying in my car after shifts, dreading every notification. People say 'just leave' like it's simple. I need the paycheck and I'm barely surviving the hours. I'm trying to figure out how to hold on without completely breaking down before I can make a move. How are you surviving burnout when quitting isn't an option?