I have wanted to volunteer at a shelter for some time now but I don't know if I could do it. I would want to take them all home. I can't believe what you have been through, how awful. I just can't imgaine losing 2 cats and facing losing another one. I don't know what I would do, it would devastate me. Sometimes I think about when my cats get older and what I will do as I lose them, since they are so close in age, it could be one after another, someday. They are young still, the oldest is 6 and the youngest 2 cats are 4 years old.
If you get out of bed , let alone do anything else,after the losses you have had, you are doing very well!
I'm sorry for your losses of your sweet kitty cats.