Piffin's post got me thinking a little ("me" and "thinking" is always a dangerous combination )
We recently had our house propped up a bit in the middle (it had sagged about an inch, over a 20+ year period).
Anyway, when they were jacking it up, both my wife and I found it to be an utterly excruciating experience--neither one of us could stay in the house while they were doing it! (at first I'd been in the crawl space with them). There was soooooo much racket; my wife thought the windows would start cracking, etc.
They said, "You know, those little 'house settling pops' you hear at night? We're just resetting 22 years of them back to (more or less) their original setting!"
Interesting! (But if we had to do it again, we'd still prefer to be out of the house!) And the drywall was only cracked in a couple places; the windows still worked (and weren't cracked); the doors that had stuck before still stuck--even AFTER the work.
Let us know how you're doing!