I really believe in the power of positive thinking. Sure, you will always have down times, but overall positive thinking is said to help. I believe that there is research that says that people who are prayed for have better survial rates. I am not a "beliver" myself, however my take on this suggestion goes back to the positive thinking thing.
I know people,one in particular who was told he had a max 6 months to live. That was 9 years ago, and he is leading a full and happy life, he is not "cured", but he is stable, a long way from dead! I believe much of it is down to the fact that he was told he had 6 months, but chose not to believe it and continued a positive outlook.
My thoughts are with you and your family.