My DS says Dada, and acknowledges daddy all the time. When I ask him who mommy is, he either doesn't know or won't say. He says cat and points to our cat, same thing with dogs, bottles and books. Should I be worried? I feel like maybe I have been working too much and he doesn't really know who I am. Maybe I am being irrational and oversensitive, but I want him to know who I am.