New Pomeranian Puppy

We just bought our first pom. The breeder says she's 10 wks old. She is just adorable. She seems to have a normal heartbeat and breathing well. But she kinda quiet. I was exspecting her to be a lil more vocal. Granted we've only had her about an hour and we've only been in the car. She's very well behaved and has just sat in my lap the whole time. I figured she'd be more curious and want to adventure around. She's some what responsive and has yawned a a few times. I guess my question is ,Is this normal? I was just exspecting her to a little more lively. Were going to stop and get some food and treats if she doesn't eat she will be going to the vet.