Thanks for your query.
Your child is having high grade fever along with gastrointestinal symptoms which could be viral or bacterial in nature.
I suggest you to get him examined by pediatrician
In the meantime continue with paracetamol
as per dosage every 4 to 6 hourly till fever is above 100F.
In case of high fever do sponging with tepid water.
since he is having vomiting also give antiemetic like domperidone
as per dosage.
Maintain hydration,give plenty of fluids.
Monitor for features of dehydration
You can give cyclopam if needed 2 times at 12 hrly interval.
wishing your child good health.