I am glad to report that Hyponatremia was not the cause. It was a very strange combination of a rare type of migraine, (basilar artery migraine) which causes very bizarre symptoms, and the physical stressors of lack of sleep, altitude, exertion, etc.
What is interesting, is that several people who have suffered from this type of migraine, seem to experience strange visual phenomena, including hallucinations, and a great many people even lose consciousness....so I guess I was lucky. For anyone else suffering from migraines, there seems to be unusual connections with altitude and severe symptoms, and lack of sleep. My doctor advised that extra acclimatization days, as well as lots of sleep, seem to minimize the risk of having issues.
Just wanted to follow up and let everyone know what it was.
