Thanks for posting your query.
At this stage the first approach would be to treat the symptoms and keep the patient comfortable and pain free.
Pancreatic cancer in that stage is too serious a disease to be managed at home.
may be related to accompanying pancreatitis
component, if she also has fever
then there may be an infection also.
You should review to an oncologist
and see if antineoplastic can be given or if antibiotics are required.
She will require some investigations and a physical examination before any thing about treatment can be decided.
I will be available for your follow up queries.