So sorry to hear of your mom's health issues and your too ((((hugs))))
I am glad you stood your ground and waited before making any decisions. I went thru a similiar thing when my mom was diagnosed with terminal breast cancer in 1997, the drs. gave up on her and sent her home to die giving her only three months if that to live. She died in late 2001 and that was due to our family giving her some care against Drs. orders and not giving up so soon. They can make mistakes sometimes and I feel the family knows their loved one better than anyone else does.
You and your mom will be in my thoughts and prayers and I hope all works out well for you. Lilly