I have another one pipping and it is further along than the one that started this morning. The one from this morning now has long cracks coming out of it, but no real hole yet. The second one has a hole and a big chunk that will fall off with the next big kick.
I know it's hard, but try not to worry too much! Some chicks pip way before they are ready to hatch, and others don't pip until they're ready to go go go! My first hatch the first one to pip took I want to say a full day (24 hrs) to hatch. It was pipped and the size of the pip hole stayed the same until probably the last hour or less before it hatched. I checked on it and there was no progress, then I checked again an hour and a half later and it had completely hatched. It was the first to pip, and I think that 8 other chicks hatched before it finally did.