Oh my, I am so sorry for your loss! I am going through the same thing myself. My friend and I got some eggs from e-bay, mine were perfect! Hers had like 5 broken ones. I put them in the incubator things went great! Until day 21. Nothing. No peeping, rocking, pipping!!! That was the 25th. On the 28th I could hear peeping in the egg, later that night one finally pipped. So I call my friend to tell her the good news she had not 1 but 2 pipped eggs. The next morning (29th) the chick finally made it debut! Only to die 4 hours later!!
I candled them again and found that out of my 19 eggs 1 is still living. I still have hope for the little fella.
After my friend went home, another of hers pipped so she has had a total of 3 pipped eggs. This morning (30th) another of her chicks has hatched!
And the other one will soon be here!! We are talking 5 days late here folks!!!
I will continue to run my incubator until I am 100% for sure that there are no survivors!
I am wishing you luck. Don't give up. Incubating is NOT an easy job! It is hard work.
BTW- The little guy that hatched out is doing great!
He is eating and drinking!!! Best of luck to you!!