My daughter just turned one and over the past month has progressively gotten worse at sleeping.  She was an amazing sleeper, sleeping 12-13 hours a night. Then she stared to take up between 2-3am when she was sick with a cold and she quickly got over her cold and seemed to be sleeping ok again.  Now all of the sudden she wakes up screaming and freaking out every night and we can't get her back to sleep.  She is completely miserable and doesn't want anything from us.  She doesn't want to coddle or be rocked and she won't take a bottle.  We literally try everything and she just cries and cries and about 3-4 hours later we can attempt to get her back to sleep... What is going on?  Why the sudden change?