Hello everyone!

I just bought a new yorkie yesterday and I have 2 major concerns...
First off, I'm not sure she's responding to sound...about 70% of the time she just ignores every sound I make...I see her ears twitching once and a while, but she doesn't turn her head at me much. I'm not sure if this is because she's adjusting (since I've only had her for a night so far) or if she's partially deaf!

I'm so worried...I have a vet appointment for her today but I just wanted to hear everyone's insight...
And right now she's about 1lb 2 oz..does anyone have an idea what her adult weight will be around?

The breeder told me 6lbs but she looks so tiny right now. Mom is 5lbs, dad was 3lbs.
Thanks