Ideas?

DD (almost 9 months) woke up 2 hours ago (after sleeping 4 hours), which is pretty odd for her. I went in and gave her 2oz milk. Wouldn't go to sleep. Gave her 2oz more. Still wouldn't go to sleep. I could tell then that it's my hunger keeping her up cuz she'll cuddle right up on my shoulder and fall asleep. I'll rock her for a while but as soon as I lay her down she won't stop crying. She's never been like this. This has been going on nonstop for the last 2hrs. I keep trying to let her CIO for a lil while at a time thinking she just has to give in, but she doesn't. Each time I go in it's the same thing. Falls asleep on me, put her down, screams.

TIA!