Yes, to all of the above. Also, I wonder if my increasing episodes of quite severe neck pain are contributing in a slightly different way - it does seem that when things get kinked in my neck I end up being far more moody and angry- like something has snapped in my brain. I also get really foggy headed as well. Could it be that a change in the blood supply to a specific bit of the brain could affect personality? I know you can definitely get personality changes with various forms of brain injury.

Of course if this isn't the case, then I have just become a nasty mean old person all on my own!