Lung cancer and coping

Hi all, well, this is a new area for me. I am at a loss on how to deal with this. My mom was just diagnosed and has months to live. I can cry and wig out on my own time, but I want to know how to help her. Not to just accept what will come, but to help keep her from the pain, suffering, all that. I'm sorry if my post is a bit jumbled, I am trying to sue all my knowledge on how to deal with this. When it is for someone else, I can help. But when it is me, I am alone and stuck and not sure what to do. All the advise and help I have given, just seems so empty, pointless, and not worth a thing.