new 8 week old puppy

[EToomey]

We just got last night, feb 23 a new chocolate lab puppy. Shes not eating anything yet she has drank some water and shes has direah and she has thrown up and looks like some blood in it she hasnt thrown up anything but flem..is the blood from her not having food in her belly? and her like dry heaving?The lady we bought her from last night said she took her to the vets her mother didnt have worms so he wasnt worried about that, she wasnt as playful as the rest of the litter, shes had her first set of shots...should we worry? or call the woman or just take her to a Veterinarian?