I have a five week old who has got into a routine of crying every night between 6 and midnight. She does not want to sleep and the only way to calm her is to walk around the room with her. She looks like she is fighting going to sleep, She starts to nod off then snaps a wake. if she nods off and you try putting her down she wakes up crying and will not go back to sleep. She will eat and eat and then spends the evening spitting up.
