Hello and welcome to YT. If you have any worries or concerns it is a good idea to call your vet. Things can go down hill very quickly with small dogs.
If you would like a short article I wrote about adopting puppies younger than 12 weeks old, just let me know. You may find it helpful with potty training and bite inhibition issues.
Best wishes and don't forget to check out YT's extensive library. Just about anything you could ask has been talked about.
