In situations like this, all we can do is keep our heads high and understand that life is borrowed time, and we must accept when that borrowed time, for us or the ones we love, ends, it's a difficult task, but it's something we must do, however, never lose hope, my dad, for instance, is a raging diabetic who "wasn't gonna go long past 40", he is now 53 years old, and although he still suffers the blasts from the disease from time to time, he's living proof that a lot of faith and optimism a lot of times go a long way towards helping a person's survival.
Science isn't everything.
My thoughts and prayers go out to you and your family through these difficult times.