Baby 'breathing' in womb? anyone else?

Sa
I know that obviously my baby is not ACTUALLY breathing in the womb, but I regularly feel her making panting movements like she is. I looked this up and apparently it's normal and that she is practicing. It's almost like she is hyperventilating sometimes though and it freaks me out a little. She usually gets hiccups afterwards and it has been going on for weeks. Anyone else have the same experience?