Managed to get out the door of school at about 12:15-ish, picked up a water and some pretzels at the store because I was near fainting, and then made the call.
I left my cell phone number in case I was en route to my parents' or the wedding for which I was singing. . . and lo and behold, after the wedding, at about 5:15, I checked my phone at there was a missed call from 3:56 p.m.
Too bad I had the courtesy to set my phone to "silent" before entering church at 3:45.
I did return the call and leave a message, anyway, but most likely I'll be in the dark until Monday.
Maybe a trip to the gym and some laundry will take my mind off it.