Dreaming of the stepchildren.

I've been dreaming a baby girl who looks exactly like my SO. I'm not sure if this baby represents his daughter, or the fact that me and him are TTC. I haven't met his daughter. So why would I be dreaming about her, in case that's her in my dream? 
I was told by a person who could see your future just by looking at you... That I was ganna end up pregnant and have a baby girl by October next year.... OR Could this be her in my dream?! 
I know it sounds crazy. Lol.