Hi K., sorry to hear about your mom, my prayers are with your family. A friend of the family was diagnosed earlier this year with the same and we were all afraid of the worst. She's been through chemo and radiation and she lost all her hair and her skin color changed completely, but she's been looking better, and getting stronger. Her hair is also growing back. Some days are not as good as others but she's able to get out and get back to church, etc.
On another note, several years ago, my mom was diagnosed with pancreatic cancer. I was her primary caregiver with help from my siblings. It was hard work but I was glad I was there for her. It was trying and exhausting and scary, and empowering, and freeing and frustrating and painful. At some point I came down with a case of vertigo, probably more from stress than anything else. But I remember one day telling my mom that I was sorry I couldn't do more to help her and she said, "You've already done so much more than I could imagine." It still makes me teary today.
Educate yourself about beneficial foods and about her meds, and all that. Do everything that you can do to help make it easier for her and for whomever's the primary caregiver. Enjoy every day you have with her, and take care of yourselves.
All the best.