I think all runners have pre-race anxiety to some level. I do, no matter how big or small the race. Usually I wind up setting multiple alarms, and am up 2 hours before I need to be in any case.
Saturday night I set up alarm for 4:30pm, thinking I was setting it for, well, 4:30am. Just before passing out, I did one final check. Took this screen shot. Smiled. Fixed the alarm. And went back to sleep.