First – 1-2 days Take plenty of fluids – ORS , Enerzal, Lime water with salt and sugar, Coconut water,black tea. Plenty  of soups , daal water, kala chana soup. Avoid aerated drinks. Avoid Milk. Avoid chillies and oily/fried food. Avoid all Meat products, hotel food, fast food. Avoid all fresh fruits and vegetable salads. Can drink packed juices .  2 to 3 day onwards Start on Soft diet like Rice Gurrel (Khicdi) , bread , toast, idli, oats, dalia, sheera, corn flakes and dry fruits

Your symptoms are suggestive of intestinal infection, especially if there is associated loose motion. Physical examination and investigation including motion examination are needed for appropriate treatment.