Is she perhaps teething? My dd got her first teeth at 9 months, but it took about a month before that to actually come through. Otherwise, try stretching her A time before the short naps by 10-15 mins and see if that helps. Every 3 months the first yr you can expect some kind of change in routine usually, or growth spurts. Make sure she is getting enough to eat, maybe add a bit more solids. Also, babies can have night terrors. Does she wake completely at night or just cry out?