I'm so, SO angry at myself--I was candling one of my cream legbar eggs when my husband called me on my phone. The sound surprised me so much that I dropped the egg and gave it a nice, lovely crack and cratered area with lots of little fragments of shell.
The membrane wasn't visibly torn/broken, although there was a tiny little bit of blood that seeped out from the center of the crater and a few little fragments of shell fell off. So I've patched up the cracks and crater with plain white candle wax, as I saw recommended, and placed it back in the incubator where it won't be rotated.
Lockdown will be tomorrow night, less than 24 hours away, so I am crossing all my fingers that, by some miracle, it will make hatch. My hopes aren't high and I'm really upset with myself, but I can at least accept that I've done what I can for it now. It happened more than four hours ago, and there was still movement when I candled it oh-so-carefully just a few minutes ago. At this point, I don't even know if I'll try to candle it again tomorrow, as I'm so scared of mis-handling it and damaging it more. Aaggghhh.