I wish I could offer advise, but instead i am sending hugs, hugs, hugs, to you!! I had to leave teaching, which I loved, several years ago because I just could not give 100% ( or even 80%) anymore and was missing more and more days each year. The year I left, my principal wanted to make my goal: "to miss less days", I told him I could not possibly have that as a goal, so I figured my time was up. Hated to go, I am now on disability starting next month, (it took 3 years to get it though).
For many, leaving their job is not an option, and I really hope that you can work out your hours to your benefit!!!
I will be thinking about you and sending positive thoughts!!!
Anne