she is nearly 3 months and so far her sleeping pattern has been really good and any change has been steady and consistent until now. she has woke me up a few times in the last couple of sleeps screaming but when i go to comfort her she isn't actually crying and after some cuddling she nods off again.
ds used to do this. He would also smile/chuckle in his sleep and feed on a invisible tit. It was very funny. He grew out of the screaming and smiling, not the feeding though. He's 9 now and still suckles on something in his slee.