Wow Frank you need as much time out from professional life as you think you can afford (an more, even if this means a life change I reckon)... I am thinking along these lines with my family at the moment. It is a hard decision to make. Since my NASAH on June 2, massive headache one afternoon, unconscious two minuteslater, helicoptered to the neurological emergency room in the city centre, then 6 weeks hospital.
I've had exactly what you said in your message ""Your headaches will vary in Location, Duration and Intensity for anywhere from 6 to 18 months"" .... sometimes these are really invasive and scary but they have vastly diminished in the last two months (screens make them worse).
Meanwhile, I will have to return to hospital in December for a few days tests including an LP which I'm toying with the idea of telling them to give to someone else !!
Oh yes, and my memory has just evaporated, no longer just a question of lack of concentrtion but really whole conversations and events from yesterday fade away like ghosts like they never existed and I am quite shocked when someone insists enough on the fact that I have just forgotten and not that the event never existed. Concentration span of a house fly too. Hope this starts to improve, I'd hate to have to write reminders everywhere.
Look after yourself, make sure the head pain at the back of the head isn't vasospasms, these should be seen to an sorted if it's the case. A friend sent me a short but spot on article on brain injuries on Facebook. How can I get this to you / to BTG? Sammy Anne xx