It could be factitious disorder -- sometimes called Munchausen's -- or it could be real physical symptoms that are caused by anxiety, or it could be totally physical. The best help for her is to see a doctor who will take seriously her physical complaints, and yet help her work out to what extent the physical symptoms are related to psychological phenomenon. There are doctors like that out there. They're awfully rare, but they exist.

Next best is to get her into therapy, and from there try to work out what's going on with her. As an adult, that's going to be her call, though.

Another suggestion for her is biofeedback, which can be presented as a way to help her control her physical symptoms.

One word of caution -- coming from someone who nearly died of kidney failure after the doctors told me it was all in my head -- this young woman is going to be pretty fragile right now. She's not being believed, she's having her physical reality invalidated all the way around, and she's not feeling as though anyone is listening. Whatever happens now, for her sake, I really hope that it's done gently, with compassion and understanding for her.

Good luck.