I set 24 eggs, candled them & removed the non-fertile and non-developing ones. Had 16 left. Seemed like all was great. Had 3 hatch a few days early. (These are australorps.) Now it's 2 days after calculated hatch date, and no more hatching. All 13 are just sitting. 70% rh, 100 degrees. Not opening incubator except to remove 3 hatchlings. I'm so sad. Was hoping for a bunch. What are the options for what went wrong?