It took me years to accept I couldn't work (I was on my way to the hospital to do my voluntary shift). I stopped off to pick up my meds and had a complete breakdown, right there in the shop in front of everyone, shouting at the manager then collapsing. Like you, I was a busy person. Over the years I've found things I could do without too much impact on my mental health, and so will you - you're already doing so. Just make sure you don't do too much ....