I am the last person who should be answering this post because I know so little about cancer. But, my heart breaks for you. You also have every right to be angry. It seems to me you have tried everything and you have had no results. But, sometimes that does happen. I have wanted things to happen in my life and when it didn't happen the way I wanted it to happen, I was very angry.
I can't tell you everything will be ok when I do not know. Just know that I will say a prayer for you that you will surrounded by love and peace.