Hi Irene! Congrats on your new little one, I hope that she is feeling better soon. How old is she? I had a problem with my Luna when I got her at 9 weeks of age.
Check out the formula a breeder told me to give her. It saved her life! Send someone out to the store for the ingredients and get it into her ASAP.
http://www.yorkietalk.com/forums/showthread.php?t=58036 Puppies need to eat, the nutrical will help until you can get some food into her, but I do recommend this formula.
Good luck and please keep us posted