throwing up??

my kitten ate very little last night, played very hard but didn't want to eat this morning and very lethargic, after he woke up managed to eat few kibbles then threw up and back to sleep and looking weak, i'm calling the vet tomorrow, i just want to see how he does today, any ideas?, thanks

Hi
How old is the kitten?
How long have you had him?
Where did the kitten come from?

No help, call vet sooner rather than later...

i have two bengals one is 7 months old but the one in trouble is 3-1/2 months old and i have them both now for a month now, came from a breeder, this kitten had the same situation two weeks ago and was given anti-biotic and something for acid in his stomach and been fine for a week until now, i introduced the innova evo but just a little mix in his dry food, had loose stool the first day but pooped normal the next and still is, and he seems to like the mixture, i don't think the very little new food is enough reason for him to be sick, what do you think?