Betsi,
You are obviously a giving person already a medical social worker, and you have alot on your plate.
You may be coping better then you think. I found the social workers very helpful and wonderful people. Perhaps you can go into your own office and ask some peers, you need help.
Sounds like you have done alot for others and your family, so it good to have some family help where you can get them.
I come from a medical family, but when my husband was diagnosed, its different. Try not to be to hard on yourself.
FOr me work was also needed at first, had to pay the bills and then there was some times I just had to be fully off. It was too much to have the work schedule and conversations in my head. My boss was better at helping me then I expected. So I also switch to part-time, as well as taking off 2 weeks then went back part-time . Then was able to do some backlog work so my presence wasn't so demanding or missed.
My school and parish were wonderful, setup a meal schedule dropped them off, and also had someone I could call each week for a grocery run. Actually they would call me, to see what I needed. Some moms throw in treats for the kids, which in the midst of all this, brought a smile to their faces.
Kids can be great, simple things can still make them happy.
Extra hugs for everybody, including you and your husband.
Keep going, you are in my prayers