Our site seems to be sorted out now.
No real clue what was wrong with it, best suggestion we’ve been able to come up with is that a security plugin that was recently installed and had had an update the night before had glitched and then corrected itself (because the site seemed to start working on its own).
Guesses and suggestions are all there are since the issue was gone by the time I’d gotten our host contacted.
In brighter news, Shanny has a book coming out soon.