I was working as a restaurant hostess, after quitting my job as a server (too much on the body).
At first I was doing very well...then, when I began having a lot of new sxs pop up, I started having trouble hostessing.
One Sunday we were very busy (it's a breakfast/lunch place), I messed up seating people...couldn't figure out how to follow simple rules in seating servers in order.
One of the servers complained to the boss that she hadn't been sat in 45 minutes...everyone was mad at me, and the boss cussed me out in front of everyone.
I quit the next day. Haven't worked on 13 months, because I seriously don't think I can remember new information. It's scary not knowing what's going on.

I hope you overcome the shame you seem to have felt when you had your "oops" moment at work, and that you're back on track