My deepest condolences.This is quite the sad news. You can feel comfort in the thought that she no longer feels any pain and that one day you will see her again.Again I deeply symphatize for your loss.
I'm so sorry for your loss. I'll be keeping your family in my prayers if that's okay with you. I know it's not exactly the same but I lost my dad when I was 10, i'm 17 now, so I somewhat understand what it's like to lose a parent.