Tina I am so sorry to hear this news, how awful for you, it is always so hard to watch a loved one go through these things, I wish your grandmother lots of good luck for her surgery and that she will recover well, its going to be tough, and remember you can lean on us all here at PT anytime you feel like it.
Hugs and positive vibes being sent your way for your grandmother, and the rest of your family., you will be in my thoughts.