My first time incubating. I was starting to get concerned because I just passed the 22 day Mark (couple hours), but then I heard CHIRP! Chirp chirp! I got so excited so I peeked through the "windows" on the top of the incubator. The egg is bumping around a bit and I hear noise but no pip (external). But there is an X shaped crack on the top of the egg! I was worried the baby was pipping in the wrong spot so I quickly candled - nope! The internal pip is in the air sack, I see it's beak wobbling around. Can they start to zip before the external pip? Is this the sign of a soft shell? Should I be worried? Everything else seems well.