Oooh, I have to ask, what did you do to screw yourself up?
Nothing that would likely make sense to anyone but me.
It started with me grabbing a daedric artifact before checking everything in the chamber where it was located and then being unexpectedly whisked away. Door to the chamber was "needs key" locked when I tried to get back in.
I bit the bullet on that one but later found most of the stuff I'd stored in a chest in a home appropriated from a defunct follower had disappeared.
My third mistake was not having a save that wouldn't have dropped me back 10 levels, so I just decided to restart.