Hi
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In all probability the stomach infection is persisting. Take an OTC lactobacillus preparation and yoghurt with your meals. Drink plenty of fluids. Eat light, do not stay hungry but eat simple things like toast, porridge, cereals, crackers, banana, rice, peeled apple, etc. Take ORS. Also you could be having severe acidity hence take antacids and see.
If all this does not help, consult a doctor immediately. Take care!
hinvastak churna is very good for stomach