No, don't worry. Even while they are hatching they will take many breaks and rest. It is hard work to wiggle around in a tight egg shell to get into position and to pip around the edge and then to push out. You will be surprised, some will start pipping and be out real fast and then the next one will pip and take a day or more to finish hatching.So I'm a newbie to this incubating thing, my eggs were rocking earlier in the day and now are still. Day 21 in on Sunday. Should I be worried that they are still now? There are no pips yet though.