Our expert says:
Moving overseas can often be more difficult than people expect, but its unusual for anyone, let alone a cheerful and outgoing person such as you describe, to spend 6 years without making any friends.
But from your overall description, it really sounds as though she has been becoming sick, and she needs and deserves to get a proper psych assessment and advice based on the findings of that. Maybe with the added stress of her father's Alzheimers, she may fear that she could be found to have the same illness, though this is not at all likely at her age.
I am a bit sceptical about the psychologist's view that hearing voices was a benign thing that didn't deserve to be worried about. The episode at the airport also suggests something FAR more serious at work. You don't mention WHICH country they were in overseas, and that's relevant as they vary in the availability of good psychiatric services.
I dont understand the other advice quoted, either. A psychologist wouldn't know whether or not your blood sugar was high, and whether it was or not, would have nothing to do with an ECG. And if it was a psychiatrist ( thuis also a medical doctor ) she saw, he could have ordered an ECG and/or blood tests himself.
The sort of voices you describe, especially those saying awful things about you, can occur in a very severe Depression ( which could well be what she has ) Further, those ideas about everyone talking about her, etc., are paranoid, and suggest possibly a very severe depression or a psychotic illness of some other kind. This is more than mere burn-out.
If the family is somewhere like the UK, it should be possible for them to arrange for her father to go temporarily into a home so the mother can come out for a while to help sort this crisis out.
Talk with this other friend she is staying with, see what she has observed, and see if she is prepared to help persuade her to see a good local psychiatrist for a proper assessment.
If she is indeed deeply depressed and/or psychotic, don't feel offended because she isn't eager to take your advice - this is about her illness, not an assessment of your goodness or rightness. She is seriosuly ill and needs help, so welcome anyone who she currently trusts and who can assist to persuade her to get the help she so obviously needs.
There are several diagnostic possibilities here, very severe depression, alone or within a Bipolar disorder, schizophrenia, or other possibilities. Only a thorough assessment by a good psychiatrist briefed with a full account of what has been happening ( which she may not herself be able to tell him ) may get to the bottom of this.
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