Don’t allow her to give up!
It is depressing to be so ill with something without a diagnosis or treatment plan!
I have been there, as well as many of Connect members.
Unfortunately, it’s usually not that easy for another specialist to review test results without speaking to the patient and doing a physical examination.
At this point her best decision would be to make an appointment at Mayo. I don’t know where you live or if it is feasible. There are other large medical centers, such as Cleveland Clinic and University teaching hospitals, where they have the expertise.
There are illnesses that are difficult to diagnose, but if she goes to a top hospital the odds are in her favor that something will be found.