1.Consult doctor with blood report like Widal/Typhidot test.
2.If it is Typhoid, you have to take a full course of antibiotic for 10-14 days
3.Take Bland semi solid diet like rice with yogurt, porridge, barley, fruit (avoid skin/seeds) custard, Avoid spicy, oily and fatty food. Take light and easily digestible diet. Take meals at short interval to avoid nausa/vomiting, .Avoid meat/poultry/egg
4.Drink plenty of water/lime juice/ glucose water/ coconut water, sugar cane/ Fresh fruit (avoid citrus fruits) Juice, milk
5. Take Adequate rest.