It would be very unusual for a child of this age to suddenly start with having a reflux problem, but you do mention that your daughter is fond of spices. It would certainly be a good idea to stop her eating spicy food now. One of the most common causes of sudden chest pain like this in a young child is due to an infection of the lining of the membrane lining the lungs and is known as 'pleurisy'.A common cause of pleurisy is an underlying pneumonia especially one kind of pneumonia called 'atypical pneumonia'. If the Xray is taken very early in the illness it may not show up on the Xray.It would be best to take your daughter back to the doctor as children do not complain about having chest pain very often and it is important to try to find the cause.
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