Okay so we are 13 hours into day 20 now, and when we woke up this morning one of our eggs has tried to pip (actually looks like more of a u shaped crack) on the side/middle of the egg, nowhere near the air sac we pencilled. It has been trying to push out for 6 hours now that we have been awake, and cheeps very loudly once or twice about every 30 to 60 minutes. Do I leave it alone? Or do I try to carefully, slowly, and gently pull back just the tiny part where its cracked in the middle of the u shape crack, to give it some air? This is our first time hatching.