Did anything change in the last couple weeks? Has this happened before? When do you normally go to bed/sleep?

I would try to get to bed "early", when your little one goes to sleep. I often get a couple hours sleep, then wake for a couple hours then sleep again but the total suits me better (than naps).

Have you had a physical lately? I'd have the doctor check it out, see if there's some hormonal or other problem if you can't find a physical/emotional one?