I'm fairly exhausted today, but I've shared on HN before that I absolutely feel this. I was in the military in a high stress role (about 20 years in), nursing an autistic child through chemotherapy, and still being a parent to my other child and supporting my wife.

Notwithstanding the other intense stress I went through in that career, I feel that I used something up making it through that. If you want more of the story feel free to look through my comments; I've talked about it in more depth a few times.