This amazing piece fromCrunk Feminist Collectivespeaks to the effect that relentless stress and "doing too much" takes on us—physically and emotionally.
While the focus here is on the impact of stress on our bodies, it acknowledges that it also brings us down emotionally. That's just as bad...and the two work together for our detriment.
Here's a quote:
"It is a problem when caretaking (taking care) becomes something we do for other people and not ourselves.