Probably a little too late now, but keep a journal w/ regard to what she says, her actions, and anything really out of the norm. Then when you go see the doctor or get her evaluated by a psych, the notes will help with the diagnosis. There's really nothing that you can do at this point...this sounds like something that only a certified health care professional has the capacity to properly understand and solve.
Best wishes, and hopefully things start to look up soon.
Best wishes, and hopefully things start to look up soon.