MY DD doesn't seem to have very long naps in the day, but will probably nap around 4 times...especially if we are driving, which we've been doing a lot of recently. As it is today, she's woken at 5am (yuck) and is already down for her first nap - 6:20am. She is a bit younger than your DD....but maybe your DD just wants to be part of the action....that is what mine does...it's like she doesn't want to miss out on anything. I also think my DD is starting teething, and is constantly rolling and moving around so I think is perhaps having a developmental leap? It could be so many things...I just make sure I roll with it with minimal angst!