Oh gosh, *blushes* - I thought MR and then thought "Mister". I edited my post, sorry about that.
I did want to say though, that when I asked about the head injury and testing for such - Are her doctors aware of this injury when she was younger, and anytime between then and now have they checked (via CT Scan, MRI, MRA, etc.) for anything.
I understand how you must feel when thinking of something 'without a cure' however, sometimes there are alternate methods to at least mask or treat the symptoms. I'm unsure of her current medical state, but ask her doctor about Inositol (this is over the counter) and maybe it will help with any anxiety and/or uneasy feelings. Even an altered diet may help some.
Make sure you update us once you hear something!