Good luck, I hope Layla turns out to be a good broody!
I still haven't given mine much of a chance to hatch since the few times I've started to let them try they do silly things (like not keeping the eggs under them very well). I bet the three eggs you have given her will be a good number for a first timer.
Aww I'm sorry it isn't looking like you'll get many chicks! I hope the ones that got kicked out will be ok and hatch anyway.
I unknowingly pulled the plug out of my incubator right before bed one time with eggs on day 17 and found it off the next morning. It was off at least 8 hours probably a bit more. They were quite cold when I found them and most didn't look good on candling. I candled again a few hours later once they'd been warmed back up for awhile and they looked much better (all looked healthy again and were moving). The hatch went well, and they still hatched in the expected timeframe (I was so relieved I didn't accidently kill them)!