Hey Guys–
Many, many thanks for the advice and for checking into my site. I appreciate the help very much! I’m happy to report that I managed to track down at least one of the culprits (the Nested Pages plugin) and my site is back to normal. Another plugin seems to have caused the site to slow down, although I haven’t found out exactly which one yet. Quite possibly the AddToAny plugin??? AddToAny is one of the plugins I still haven’t reactivated and the site is running at its normal speed.
As for Nested Pages, I upgraded it along with Yuzo this morning. The strange thing is that I have had it installed along with Yuzo on my other blog as well. I did not upgrade Yuzo prior to uninstalling it on that particular blog. I did, however, upgrade Nested Pages and it is still active there. So far that blog is working just fine with no problems whatsoever.
Anyway, thanks again guys and hopefully this issue is now officially resolved!