Frank,
How is the puppy now? Have you looked around? What do you think he has eaten? What kind of plastic - soft, hard, sharp edges, soft edges, do you have the bit he sicked up?
A 10 week old pup is very fragile. In the best of all circumstances, he has eaten a bit of soft plastic that has passed through him without damage. Otherwise, that pup really needs to get to a vet now. Can you call your dad and is there a neighbour who could take you? Otherwise ... who in your immediate neighbourhood has a pet? Can you call them and ask for an emergency vet number? I have heard that some vets may charge for this though my own does not - even for panicky calls in the middle of the night.