Numb-
I can totally relate to how you are feeling, maybe not exactly as no one really can, but similiar. My mom has metastatic breast cancer. It is very difficult to see your mom I'm sure go through this painful process....and i have been for a few years now. Lately its been really really difficult. My suggestion to you is to stay strong for your mom, try not to show her your fear, fear can be a powerful negative energy. Just try to send her love and support.
However, the second suggestion i have for you, show your fear to your friends, let your emotions out, don't keep it inside! If you do it may come out somewhere where you'd rather it not, like it did for me on friday night out with a friend drinking...
life is tough. very though. but all we can do is trudge through, be strong, believe in miracles...and send love to your mom.
I hope things go well--and just because a doctor says one thing, doesn't always mean it is true, no one can tell how much a person has to live, or what will work or not work. Explore all your options, research and learn!!! Be your own advocates, these days you have to.
Best wishes~
Angie