I wish I could admit to all the stupid things I have done today, but I don't think I should. So, I will tell you the funniest (IMO). I opened the incubator to remove the first two chicks. I saw an egg that was stuck large end down, leaning on a sponge. I gently went to move it flat when my finger went through the shell. I almost cried! My breathing stopped, and I held my breath as I placed the chicks in the brooder. I kept praying to hear the egg cheeping!
It was an empty shell!