Hello welcome to HCM
It is common in children to have
diarrhoea. Your son is having diarrhoea,
vomiting since last two days. There is no
fever so most likely the infection is viral diarrhoea. He is feeling sleepy, tired, hadn't eaten anything so most likely he is in
dehydration. I'd advise you to check his skin turgor, if the skin turgor is lost and skin is wrinkled then there is need to visit a doctor because he is having vomiting.
ORS or oral rehydration solution can be given if his vomiting reduces, otherwise IV fluids can be given to restore the hydration. Serum Sodium, Potassium should be checked to find out any electrolyte abnormalities. Medicines like Ondansetrone,
Domperidone etc can be used to reduce the persistent vomiting. Take him to a doctor preferably a paediatrician for evaluation if symptoms increase in severity.
Thanks, Hope this helps. Take care