10 month old - rapid breathing and moaning/whinning sounds while sleeping?

My daughter is almost 10 months old, and for the past little bit (not every night) I'll be woken up to her breathing VERY quicky while whinning/moaning (the sound is kind of hard to describe).. I forgot to mention it to the doctor at her 9 month visit, and I was just curious if anyone has any idea of what it could be/is it normal.. I kind of though maybe she was dreaming... but I dont know.