I had planned to keep working 4 days a week until I was 66 but it is looking like I just physically can't do it. My employer was very cooperative when I cut back to 4 days a week. Now I have requested 3 days a week and they are once again working with me on it. They are even letting me keep my benefits and insurance. I am quite relieved. DH is still working full time and wants us to switch to his health insurance just in case I have to quit altogether.
As Ecclesiastes 3:1 says "There is a time for everything and a season for every activity under heaven." It looks like this is the time for more rest and less work.