Chicks-n-Horses,
I know that feeling... that one where you think you are going to throw up! I did the same thing about a week ago. I even posted about it here.
While candling, I dropped the egg on the countertop... cracking the egg on the side of the pointy-end. It was quite a large crack, that ran in several directions. The over-whelming nausea hit... the thought that I might have caused one of my baby chicks to die was almost more than I could handle. I was in tears as my hubby tried to comfort me, reassuring me it was probably okay.
I did nothing... just placed it back in the bator and decided to let a higher power take over. There was no seepage from the egg, so I assumed it was only the external egg shell that was injured. This was my last day to candle... they were due to hatch in three days!
I placed it in a special place in the bator where I could keep an eye on it. Imagine how surprised I was when it hatched! It was the third to hatch out of 20. However.... the story does not end there.
Though the chick was perfectly formed and appeared as normal as the rest of my fluffly little butts... I found it dead about an hour after I placed it in the brooder. It had completely dried and was up moving around the brooder the last time I checked on it. When I found it though some time later, it was laying directly under the heat lamp, on its back, dead. I have no clue what happened, or why. I'll never know.
I'm sorry I lost the one.. but so thankful for the 19 that survived all my goof-ups during incubation, temps spikes/drops, and problems keeping humidity up! Good luck with your hatch. I'll say a little prayer for your egg/chick.