What is the signs of parvo in a puppy?

he threw up a couple times last night (but my boyfriend has beend giving him treats for going to the bathroom outside) it was reddish as the middle of the treats, he's only 6 or 7 weeks old we've had him for about a week he was bottled fed and than switched to dry food mixed with hot water, but he's been eating purina puppy chow. Now after he threw up he hasn't really moved he wants to cuddle our vet said to feed him cottage cheese but she won't be able to get him in untill monday when he was scheduled to get his first shots.