My Sin Is Use To Drinking Pediasure No Issues Ever,

My sin is use to drinking pediasure no issues ever, but last night he threw up 3 times. Twice pediasure and the last was regular food. He went all day today with no throwing up until about 6 pm and so far has only thrown up once. He doesn't really want to eat anything either. He will be 3 in February and he is also autistic so it's hard to get him to eat a good that's why I give hum pediasure. He also has no fever. He threw up the first time after a car ride once we got home and the threw up 2 more times after that. Then tonight he threw up the first time after a car ride again.