My puppies are the worst eaters ever, but pretty active. My younger pup was born on Christmas day too!

You can try hand feeding her at first, sometimes that works. I've also read that letting your pup sleep with a shirt you have worn or a blanket you use can be comforting because of smell. I would keep things relatively calm for her though.
If you are concerned about health, some signs that something is something "wrong" are: unkempt fur, gooey eyes,
red eyes, excessive drool, very drippy or dry nose, etc. Going to the vet with a new puppy is a good idea. Sometimes they can have worms or other health issues that the vet can take care of pretty easy. It would also be good to ask about heartworm preventative and flea/tick treatment medicine. Flea season is coming up (in Oregon at least!)
Congrats on the new addition!