What Causes Chest Pain Followed By Vomiting In A Cancer Patient?

My girlfriend is in I believe end stage breast cancer, she has developed chronic/malignant ascities, it is progressively getting worse, she is filling up more rapidly with fluid, about every 2 to 3 weeks she has to have the fluid drained, they are getting over 6 litters each time, she has lost a tremendous amount of weight, she now is having trouble eating, trys small amounts, maybe once a day, maybe some applesauce, beef broth, half of an English muffin, as the day progresses she developes pain in the center of her chest and it just sits there, within a few hours she is vomiting and then feels better. She is sipping on warm water as much as she can stand to try and stay hydrated, but she appears very dehydrates, she is very weak, not jaundiced but a ashen look almost. She thinks she has picked up a bug but I think her body is starting to shut down. She chose to treat the breast cancer which she discovered about 11/12 years ago with alternative methods. She was never officially diagnosed by a physician, but its certain the cancer has metatisized through her body, her eyes have been progressively sinking back into her skull and look very small, light bothers her very much, this has been going for several years now. She is considering seeing a rheumatologist. I think its to late for her. What can she expect at this point, is there any chance these new symptoms can be reversed? Thank You.