Occasionally, my DD will do a weird thing while she is sleeping where her breathing changes to a quite fast panting/gasping type breath, and she will whimper/moan/squeal with each breath. It sounds like she's on the verge of tears - but she is fast asleep. It won't wake her either, eventually she'll settle and her breathing will go back to normal. My DD is four months old now but this has happened a few times now (spread out over time, not just all at once). It happened this morning and I was trying to google it to find out what it was but no luck.
Has anyone else experienced this or know what it is? I'm not too worried at this point, just mystified and would like to be able to give whatever this is a name!