Are you getting enough sleep long term? I get (admitedly mild) headaches from being tired - it might also affect memory - but I try not to hold onto the past anyway. - maybe the headaches get more severe the more sleep deprived you are. It could be from medication/withdrawal of - or (as in my mum's case) - it could have something to do with your neck - my mum gets a constant pain on one side that shoots up from the neck.

Also I'd love to see pics of vlad! (no pressure though) - i was wondering also do certain animals respond to types of music? - could try different types. I also wonder what he's dreaming of...