Leo

for yourself, stockpile PATIENCE. Go with your girlfriend to every doctor appointment and treatment, Take notes independently and ask questions for her if she is not up to it,
Being a caregiver is harder than being a patient in my mind as I see what my wife suffers.
If not body has mentioned it yet, discuss getting a PEG (feeding tube) before the surgery if there is going to be any issue of swallowing or eating, It will really help her out,Take care of yourself during this time as she will really need you,
finally, have HOPE
Charm