dd is 2.8 and has ALWAYS slept like an angel. Suddenly she keeps waking up (between 11pm and 1am) crying & won't go back to bed. I'm against leaving her to cry - even though it is definitely 'put on' as she pauses to listen, but I don't see how her standing on the landing, crying, will get her back to sleep. Last night I slept on the floor of her room. She settles down once she's got me, but I'm exhausted & have a job to do. Any advice?