@Lee, yes, you are right it is a conspiracy. Gremlins are real and they wait in their nasty little gremlin holes where General gremlin is setting out a detailed map of all the things that will break down:
"okay! at 10.15, squad irritant will head to the washer, at 11.00, Squad nusanse will hit the light bulbs, ---- now how is team vexation doing loosening all those screws? I want those shelves ready to collapse exactly at 12.30 just after he's got back from buying a new lightbulb"
Seriously, one thing I have noticed myself is that more than whether I can carry out any given activity, how well I react to any kind of upset, demand or thing outside of my immediate ideas of what should be depends very much on how centered I am. It's not so much anything "out of my control" as anything which conflicts with a ffragile sense of where I should be, or what I should be doing.
At my worst moments when I was severely isolated and fugueing, even something as miner as dropping a glass or wwaiting for a late train would bother me, still less if it was something to do with one of my destractions.
I remember for example getting extremely bothered by the fact that the dvd menue on the Startrek Deep Space 9 dvds was not the same as the one on Next Generation, and I couldn't find the highlighting to tell me what episode was what considdering I couldn't read the text, actually I'm a little ashamed at how I over reacted at that point.
So, while I can completely understand past history playing a major part in certain tasks, especially if you've been told "you can't do so and so" or "you should! be able to do so and so but can't because your too insert unpleasant discripter" I do also think there is a huge element of centeredness, of needing to be grounded in more than just whatever your favourite coping stratogy is and however you distract yourself from negative thoughts of the day.
I very much like tbkkfile's thoughts on a dayly meditation for this, although I know myself when I was at my darkest meditation could too easily turn into a self destructive need to pass time with nothing. For me, it was usually music that wrenched me out of those sorts of feelings, and that wrench was hugely painful and often involved tears, however once I was out of that particular place I could look at things objectively, ---- which is actually what I did with the ds9 menues, (like so many other things I worked them out and found! some visible highlighting, indeed I rather want to watch the series again now that I am no longer constantly concentrated inwards and can actually follow the story).
So, I really hope you can get around this, ---- and stop up all those gremlin holes