Sleepless Nights

What is wrong with my baby girl??

Seriously she will not sleep!!

She had been sleeping 12 hours ever since she was 3 months old but these past few weeks she's been getting up numerous times throughout the night. It feels like we're back to the newborn stage??!! It also feels very familiar, her big sister did the exact same thing last year!!
We've tried everything, and nothing is working. Not even the tried and true method that worked with big sister.

Is she getting enough to eat?
Is it her teeth?
Is it her tummy?
Is she just playing us for fools?

I'm praying for this to resolve itself sooner rather than later......please Lord!!