Hello and welcome to Allnurses! I feel for you---my situation is different, but I can empathize with you all too easily even though I'm still in nursing, at least in a peripheral sense.
I consider myself to be 'semi-retired' because I have a psychiatric condition that was out of control for quite some time, and by the time I finally got better my career was pretty much in ruins. Now, thanks to the resulting cognitive changes, about all I can handle is my weekend position doing admissions and QA work for a nursing facility in my area. I hate
it that I'm not the nurse I once was---I can't even work the floor anymore, let alone hold a management position like I used to.
Unfortunately, something crossed over in me this last spring when the severe stress led to a nasty mixed-manic episode that nearly landed me in the hospital, and after that I became anxious just THINKING about continuing in the same fashion. I still do. I couldn't go back to that if my life depended on it. It's a shame, because I'm still a decade away from retirement age, but it is what it is.
Still, I try not to feel too sorry for myself, because the lower stress levels have helped me stabilize even more and done wonders for my blood pressure as well.
Guess it helps to look on the bright side, yes?