What surprised me was the deep feelings of inadequacy and depression I felt at what is in all actuality a small event with (usually) little consequence*. But the meaning to me was one of failure; if I can't even keep a wallet about my person what hope do I have?
I purposely got a wallet with a chain to attach to a belt loop so it would be harder to lose it. But in my rush I didn't do that, and it must have been the rush that caused me to be careless.
I knew it was silly as I was feeling it, that I was feeling low and also irritable, so I took myself off to my darkened room. This is quite unlike me. But through it all I maintained a sense of perspective.
Now I feel quite OK, especially now I know it's been found, so I can stop looking for it. And once I was over the worst of it, a beer also helps :)
* After losing my wallet so many times before, my wallet now usually only contains a small amount of cash and two cards from the same bank in it.