Falconbird I am well impressed, you have done so much yourself, and provided such practical and financial help to your family.
When I went through a period of divorce/selling a house/ buying another house, I was superwoman, did the lot no bother. Once it was all sorted and I was into my new home, all paid for...... the air went out of me.
You probably have been so busy there has been no real time for you. Now you've time to think.
It's a pity if your agoraphobia keeps you from doing things you'd like to do. If I'm understanding correctly you are able to get out of the house to some extent.
I can't add to what has already been said except to say also, please be kind to yourself. Treat yourself.
And although our offspring don't always be as supportive as we'd hope for I agree that often it's because they believe we are really strong, and we are doing ok !
The suggestion of writing to your grandchildren sounds wonderful. Just a private journal with little gems of interest, when you were their age, when their parents were their age. How you felt about your parents when you were their age.
I did a letter to my dgs as a baby and can't even remember what I wrote in it. Something along the lines of I wished him a happy life and he would always be loved. I gave it to my son to give to dgs at some stage, probably when I pop my clogs.
I am sure your family love you to bits. You sound wonderful.