Suffer From Breast Cancer Spread To Lymph Nodes Near Clavicle And Lungs. Weight Loss And Dehydration. Anything To Be Done?

My mom is 74 yrs. old. She was diagnosed with breast cancer in 2001 & has been in remission until recently, as the cancer has spread to lymph node near clavicle, lungs, & is attached to esophagus. She also has a schatzki ring & is unable to eat/drink. She gags herself & regurgitates everything. Some days she gets a little bit down, but I'm concerned she is dehydrated. She has lost a lot of weight in the past year - about 80 lbs (was 200 now down to 120). She is a difficult patient & her doctors are not working together. She refuses to get a peg, which was recommended. She was in the hospital recently due to a fall & was fed with an IV - went home after 3 days feeling better. She had an esophageal x-ray & was told there is no obstruction in the esophagus. I'm scared she is dying, but none of the doctors are talking.