Maggs,
It's been 20 years since I lost my mom and there isn't a day that goes by that I don't talk to her. I too felt there was noway life could go on w/o her, but your know what. It does. Lean on family, friends, clergy, and nowadays we have places like this for help. She sufferred a long time with her illness and darn that was hard, so I know how you feel. But, your mom is still here. Cherish the moments, live day by day with her. Think of all the things that you want to talk to her about and do so. Just spend time with her. I realize she is suffering but they can give her medication for that will minimize the pain, but having you next to her minimizes it also. Just be there for her and you. My dad is now 87 and in very poor health, I see his day coming soon. So, I'm thinking of all the things I didn't say to mom that I'm saying to dad. I'm also doing this while at 51 years old, and a family of my own, I'm fighting tonsil cancer. So, life can be tough at times. Just hang in there, be strong. Act the way she would want you to act. Live your live in the way that makes her proud, today and forever and you'll be ok.
God bless you and your mom.
Rick