hello and welcome
this brain injury thing seems to have a very broad spectrum I had no memory for 30 minutes prior to injury I dont know how long I was unconscious, I can now 9 months later only remember snippets of the event medics tend to access people using the premis of unconscious semi conscious or conscious and the notion of lucidity I would describe my state as semi conscious on arrival at A&E by this I mean running on instinct I knew my name and address but didn't know were I was, could walk, but could not tell my left from right I thought I was in a town I has been days before, I did not feel sick ? in fact my brain was in shock and had shut down and in a catatonic state, it is our instinct to get up but ,I would say I was still unconscious for another three hours after my arrival at A&E, so I feel the time one is unconscious is irrelevant I only feel nauseous now my brain has recovered from the shock I think medic access on a thing called the Glasgow coma scale ? by reading this you might think I have no cognitive impairment.but this has taken me hours to write if it was not for the spell checker and ctrl C this would be gobbledygook ah! the spell checker got that one right

I can read and understand but cannot hold a word in my mind my short term memory is shot unfortunately neurosurgeons cant insert a new ram stick

so the computer is my aid memoir I think it depends on the persons intellectual development pre injury and the damage sites, I dont remember I have forgotten something, cause its not there.the PDSD and low mood you feel may be treated by neurophysiology I hope to see one at some point I can understand your fear of fainting could trigger PDSD and a blow to the head is never a good thing I am not a doctor so can only go on about how it is for me hope you get some answers here and good luck with your study's