Kim,
First of all, let me say how brave and strong of a gal you seem to be!!! Im sure that helping your mom through these panic things is rough since you have the same disorder, but you seem to be doing it great.
Second, I think that it is a good thing that your mom opened up to you about her feelings twords dying, because this way, you can help calm her down and tell her that having cancer is not a guaranteed death sentence. My dad was very scared about the same thing, and his situation is turning out better than expected right now. (read profile). When my dad was feeling this way, I printed out peoples profiles who are survivors to prove to him that these great things DO happen to people, and now I am proud to say that I have one to be printed out too!
We had months and months of bad news. One bad spell after another, and we always said "Things have GOT to turn up... the good news will be comin soon...and it did"
Continue to be there for your Mom, shes gonna need you, and you seem like the right gal to be there.
Sorry if this got lengthy...I just hate reading that people are so scared. I think its the worst part of this beast!
Jamie