I wish I could remember where I got this info from, but it was a reputable breeder...
"Much has been written about incubation, too much in fact. In truth, a healthy clutch
will hatch in just about anything other than the glove compartment of your car. The only
requirements are that humidity be held rather high and that temperatures stay within
reason. We hatch all of our Ball Pythons at 88-92 degrees, but it can vary a bit. I've
seen eggs hatch anywhere from 78 to over 90 degrees with no ill effects. During a spring
power outage at our facility, our eggs cooled to 65 degrees for a period of at least
twelve hours, and all hatched without problems. Stable temperatures are not as important
as most breeders believe. In fact, recent research indicates that some variation in
temperature may actually produce a more even sex ratio in the hatchlings and produce
larger, stronger hatchlings.
Eggs usually hatch around 52-60 days of incubation. When babies start pipping we
move them into a hatch box which is a slightly larger container with moist paper
towels and extra ventilation holes. They remain in this container until they leave
the egg completely. At that time we rinse them off and place them into a tub with
moist paper towels, many hiding places and a shallow fresh water dish."
At any rate...not much you can do now other than hope for the best...