DD (15m), normally a good sleeper, has started making this high pitched wailing sound a few times a night. Normally it goes quiet after one wail. If she continues for a bit and I go in, she doesn't really seem to be awake. Doesn't really respond to me. If I soothe her a bit and leave she seems fine, until an hour or two later.
Only thing I can think of is that she might be in a bit of pain with her teething and it's enough to unsettle her but not wake her fully. Or dreams?