Hello,
Could you post back and tell us what her typical day looks like? When she wakes, naps, bedtime? What does her bedtime routine look like? Has anything changed lately? Has she been ill? Is she working on any new teeth?
Chances are it is just a phase she is going through. The important thing is to remain as consistent as you can, as this will make it easier to get back on track. My ds went through a phase like this at the same age, with waking really early, etc.., so I feel your pain!