I had one this morning that did that as well. It just had the teeniest hole pipped in the shell. I finally helped it out. All the other chicks hatched so fast, that I just knew something was wrong. It's a good thing I did, because it looks like it was too big for the shell. It was probably a pullet egg, but this hen started laying in a hidden nest, so when I found it, I just took them all and put them in the bator. Now the baby is drying off, with its butter bowl 'cage' around it, so the other 8 don't peck it!
Good luck with yours! I hope it comes out OK. I have had some that pipped and did not hatch for at least a day. My first hatch was so messed up, that some popped right out, and some seemed like they took forever!
Just use your judgment, but if you do decide to help, read the sticky about intervention first, if you haven't already.