I had 2 ducklings to take over 40 hours, so don't panic just yet. Let it rest and do its thing. As long as you can tell it is able to get air, I would wait. I know its difficult to watch. Been there. What happened with the other one that you took part of the shell off? I've been dealing with my own hatch, so I haven't been on here much.
That one did not make it I helped out to early and I feel so horrible!! The other 2 rotted and exploded so this is my only one!