Just being cracked is exactly what you should see at this point. Here is what I *usually* see with duck eggs:
* Tiny dent, variable in size but usually hard to see unless you know what you're looking for
* Several hours later, *sometimes* the dent will expand into more of a crack
* 18 to 40 hours later, the dent expands into an actual hole where I begin to see bill poking out--sometimes
* 30 minutes to 4 hours later, the bill begins actively working, expanding the hole and then working its way around the top of the egg in a line.
* 30 minutes to 2 hours later, the line goes most of the way around the top and the baby begins pushing on the top
* 15 minutes to 1 hour later, the baby succeeds in pushing the top off and begins trying to extricate its head from the egg
* 15 minutes to 1 hour later, the baby pushes its head up and out and begins trying to pop the rest of the way out (if the egg is on its side, this often happens simultaneously)
* 15 minutes to 1 hour later, the baby is out and spastically flopping around the incubator with no coordination at all, looking like a string puppet with a crazy child at the controls
* 30 minutes to 1 hour later, the baby has gained some physical control and appears almost normal, but still weak and wet.
Variations from this "plan" are also normal, unless, again, you see real warning signs. With exceptions, eggs that pip externally usually make it all the way out. The externally pipped one has already passed the most dangerous portions of the hatch, and now just needs to rest and gain strength before finishing the job.
The second egg may or may not make it. When I have a large hatch, I will sometimes have eggs that pip as much as 3 days apart. So I would give it a while longer.
Meanwhile, you're doing just fine, and so is the egg. Find something to do with yourself for a while and move. away. from. the. incubator.
Seriously, you'll be much happier in another city for a few hours.
