re: 'telling the difference between work burnout vs. residual issues from a traumatic history', this is a nuanced topic but from the perspective of your nervous system, there really isn't a difference—the emotional debt (which could also be labelled as 'micro-trauma') that accumulates doesn't neatly distinguish between work + life as we have a tendency to do (the RED framework in the report was our attempt to describe this process in more detail).
Taking an initial 4-week break is really important step—I would encourage you not to commit (at this point) with a date for when you will return but see how the coming weeks unfold. It's also critical to seek help during the recovery process, ideally from someone trained in a form of therapy that addresses the body (Somatic Experiencing Therapy being a good example). Did you notice the [Resilience Wiki](http://resilient.wiki/) that we've started towards the end of the report? Hopefully some of those resources are useful. Also, please feel free to get in touch directly: jonnymiller[at]mac.com