Outlook 2010 deleted reminder accidentally

I accidentally hit the delete button before reading a reminder in Outlook 2010. The problem is I use reminders to track very old events and usually have no less than 10 reminders popping up a day... often going unread for a week, etc. Now that I accidentally deleted one, I cannot find it again and have no idea what it was. It's not in deleted items, and I can see no way to find it other than going through probably 2000+ items in my calendar.

Anybody have a trick for this odd problem? Is there a way to arrange completed tasks(?) or something by completed date? Would deleting it be the same as completing it?

Similarly, is there a way to turn on a prompt for the delete button?