Hang in there mate. You're a good guy who deserves a break. I don't know all the details of course but I am myself preparing myself mentally to deal with my parents end-of-life stage with likely dementia. Sometimes career has to take a back step (if you can afford it) to focus on the things that are really important - while you can.
All the best.
RE: Grateful to be able to write here when my mind feels like it's overflowing with worry and insecurity