Oh no! :hugs
You really have done everything for her. This is so sad. I guess the other question is: How can you help your best friend end her suffering?
My heart breaks for you........ I am so so so so so sorry........
I am rooting for you both! If there is something I can do from California, I'd do it. Seriously. PM me if there is anything I can send to you or do for you.
Always seems to me that these things happen at the most inconvenient times. It sounds like you are doing everything you can. I really do hope she recovers.