Frequent vomiting by toddler

by Irina
(Bali, Indonesia)

My 2 year old boy woke up today with vomiting after every feed or drink. We haven't found anything suspicious in the vomit it's mostly clear or Dodd that he's been eating! He is other wise fine playful and asking for food and water but throws up 10:15 minutes later of eating or drinking!! We are now worried if it's ok for him to go without eating and what should we do next? Please advice, Irina.