Hi,
I am really sorry that you're going through such tough times.
I really wish I could write something worth reading, but even though I've been through more or less the same with my own mother and I could tell you my story, I don't see how it would help you anyway...
However, I've got one of these just for you:
You're carrying so much on your own and I think you're doing great! It may not look like it, but things will improve, just keep pushing through it!