I meant to ask my doctor two weeks ago but it slipped my mind.
I asked him, today, if he had previously heard of those cracking sounds.
He hadn't - but he wasn't surprised, either. He said it may be the babies joints popping, and then talked about how many crazy things that happen in a pregnancy that never end up being anything bad.
That's probably why no one seems to know about that sound, except for those of us that hear it.
I would prefer to know exactly what it is ... But that's okay.
I had heard that cracking before and my other two babies were perfect!