I bet she does settle down, although it might take a month or two. Whatever is driving her behavior could well be a function of how small and helpless she is at the moment. Then again, as she matures, the endless chirping may evolve into something even louder and more relentless! I guess only...
Sometimes a bird (not only a chick) will learn that certain behavior elicits a desired response. And then they perform that behavior when they want that response, even if it's not something that most birds would do.
We had one rooster & hen that learned that when they gave a predator call, I'd...