Doctors can't seem to help my mom, anyone have any thoughts?

So this is kind of a long story, but several years ago my mom was having this terrible time eating, she would violently vomit, and be in excruciating pain. The doctors thought it was her gall bladder and had it removed, which seemed to stop the problems. A couple years later it started happening again, and they found a left over gall stone somehow floating around (even though she was gall bladder-less). They removed this, but the problems persisted, she eventually lost 60lbs because she was unable to keep anything down, and could barely get out of bed. The doctors then umed she had "Sphincter of Odie" and proceeded to surgically cut the bile duct I believe to relieve some of her symptoms. When her pain continued she found a new doctor who determined that the operation had given her chronic pancreatitus, and she had internal shingles, on her pancreas and stomach, and that each operation or surgical procedure done would most likely cause the spreading of her shingles. Now, years later, after stabelizing somewhat, she found out that most (if not all) of her hormone levels were very low, and had to get a historectomy. since then, her joints have begun aching terribly, and she is on an insanely high dose of vitamin D in hopes of correcting it. She takes multiple meds for her problems, but the doctors say none would cause her joints to hurt like this. She has trouble walking, and moving around normally, and is now also having trouble breathing. She just went to the hospital the other day and found out that the CO2 levels in her body have been steadily increasing, while the O2 levels have been steadily decreasing. She can't catch her breath, but since her O2 levels are at 94% the doctors aren't worried (because they say it should be below 92% in order to worry). She got a chest x-ray and everything in her lungs looks clear, and doctors are pretty much writing it off. Now, personally, I think her body isn't absorbing things like it should, and I don't know what part of the body is responsible for the absorption of chemicals in the body, but clearly there's something wrong with it. doctor's can't seem to figure it out and don't seem that interested since she hasn't gone in to a coma yet (soo annoying). But i'm only 20 years old, and am trying to move out of her house, and with all these health problems (seemingly getting more and more serious) I'm starting to feel like I should stay here and take care of her in case this really IS something serious. I'm sorry for the essay, but if ANYONE has any thoughts, or suggestions as to a doctor who works on specialty cases, PLEASE LET ME KNOW