what is helping me a bit is to tell myself that God loves me unconditionally. Can that help you at all? It might help with feelings of isolation. This is painful to write but maybe you should give up on your sister. I gave up on mine and hardly ever think of her. When I do it becomes too painful again.
I believe in golden safety nets although i forget them at times.Help comes when you least expect it. Unlike most people I believe that sometimes God gives us more than we can bear and then the help usually comes. The impossible becomes possible. I remember once I was so down I snapped. I was in great physical shape. I said to myself nobody can take away my happiness. I started taking walks and enjoying nature and became so possessive of my happiness even though it appeared my world was caving in.
Now I tell myself God gives us what we need not necessarily what we want.
Sometimes that works.
I am so happy for you that you have your health. I wish you could get in a better place.
Bobby