Are her incisor teeth through? I'm going through hell at the moment with my DD who is 18 months. Waking up screaming from her day naps (which have only just started again), waking up screaming though the night, sleeping so restless. She's cracked through two incisor teeth this week (poor bubba) and just today she didn't wake up screaming from her nap and fell asleep without fuss at about 9.20 (when lately its been around midnight). Good luck, it really sucks