This is the best advice. Take baby steps. From my perspectiv, 1 week is too short a time to fully assimilate the difference. See how you feel after 2 weeks of total disconnect from the job. Are you feeling relaxed and unwinded? Then the job is the stressor. Else, the source is somewhere else, though the job might also be a contributing factor.

How do you feel after joining again? Do you feel energetic/normal and interested in tackling office work? Then all you need to do is take care not to work 80 hour weeks and take an occasional long vacation.

Back from vacation, do you start dreading going to office more? Then the office is the problem and it is deep rooted. There is the justification you need, right there. Run away as fast as you can, protect yourself . You totally deserve that.