My baby has not slept ALL day. She has maybe had a few fifteen minute snoozes but that is it. Now, it is 11:00 at night and she is still refusing to go down. She wakes up every time I set her down, and is abnormally fussy. Her eyes are all red because I know she is exhausted. She is 5.5 weeks old.

How can a baby just not sleep? I mean, she has to go down eventually right?