If you candle it does the shadowing part kind of disappear for a moment? Kind of like down back down into the black area?? If so then it's not fluids, it's your baby PLAYING HIDE AND SEEK, he's saying Oh no your not going to see me yet. So then let him do his thing,..
and more like 17 babies!
and yes, that's what it seemed like to me too, like they're trying to break through the membrane