Hi Daughter in VA,
Your post is very moving and I'm sorry for what you are going through. Thank you for sharing with us and I hope you know you can talk to us here.
Also, I don't think it is naive to think she may make it through. That's the way you have to think and she was strong to the end so you had reason to think the best.
My uncle passed away from Pancreatic cancer 2 years ago and it is very sad and hard to lose someone so close, especially for you losing your mother.
You will be in my thoughts and prayers and I hope you continue to post here and let us know how you are doing.