Bella's first words?

I do believe that Bella has learned some new words other than Mamamama and Dadada. I swear I heard her say *Uh-oh* the other day and when I repeated it so did she. I'm not sure she's putting it in the right context but it's a word! I also noticed tonight that when she's tired she'll start saying *Nanana* which I realized may be her word for Night-Night. I'll have to pay closer attention. I'm such a bad mama that way.