Puppy pre-school? She's been vomiting, had daihhorea, is fairly listless off and on and we are all worried about her well-being. Puppy pre-school doesn't even come into the equation Amy.
I'm not one to be a worry wart when dogs get tummy problems, but then again I've learnt the hard way that we must be vigilant just in case.
We are not vets. We do not carry responsiblity on this fourm for the health and well-being of any animal. If you yourself are in any doubt during the night or tomorrow morning, you truly should contact your vet who is qualified to deal with this, or at least ascertain there is no further illness.
Hopefully, she has just had an overload of stimulation, different foods perhaps that she is not used to and a nice night of routine and rest to clean out her insides is all that will be needed. Good luck Amy.