This must be so stressful for you, her family, watching her ignore her symptoms & her health & heading down a path of possible destruction.
Her symptoms shouldn't be ignored any longer, -but I don't think anyone can give you any answers before she is examined because it would only be guess work. There are any number causes for her symptoms.
It must be fear that is keeping her away from the Doctors, do you think?-or is it simply that she has been drinking & doesn't want her doctor telling her to stop? Maybe she knows her Doctor personally & this makes it harder for her.
Maybe she would be happier going to a hospital or clinic rather than a "person"- might be worth suggesting to her. Try & find out the real reason why she is refusing help if you can.
Best of luck & let us know how you go!