This is Oral Thrush and needs to be treated with Nilstat drops 1ml every 6 hours for one week. Let us know after 3 days if there is any improvement.
Persistent vomiting at 2 years??? very unusual. "Khanay say pehlay"??? Even more unusual. What is the weight of this child? Are you trying to over-feed?.... So many questions need to be asked. Pl see a good child specialist soon.
Must see a good pediatrician soon. These symptoms are very unusual. If the weight is 10-12kg you are over-feeding. If less then 8 kg , child needs investigations. Take him to a consultant pediatrician please.