Wow. I can't even to begin to imagine what you are going through. I don't know if you decided to tell her what the doctor said or not. My suggestion would be to not. It wont change anything for the better. If she thinks she is getting better, let her keep up the positive thinking. Spend as much time with her as possible. Nothing else matters. My grandfather died 10 years ago. The thought that I didn't spend enough time with him in the last few months is something that still haunts me. I had a new girlfriend at the time, so I was spending all my time with her. Now, she is my wife. I have spent plenty of time with her, and now looking back, I see that I wasted the time that I could have spent with him. I don't want the same thing to happen to you. Every moment is precious. Stay strong. She needs you. Don't let her see you down. Keep her happy and let her know how much you love her. Thats what will make you a hero.