So sorry, and there's not really much anyone can say to make it better. It's a long journey and my thoughts are with you on it.
I work for a hospice and one of my patients was in prison for three years, cancer spreading all over the place without him even knowing he had it. He died within a month of finding out. It was terribly fast, but on the other hand his family was very grateful that he did not have to suffer for too long. No two situations are ever the same and I know that doesn't make the pain go away, but I hope you can at least find comfort in that idea.