You could be suffering from allergic cough
or cough variant asthma-a type of asthma. Take a Montair LC, a bronchodilater in the form of inhaler like Aerocort 2 puffs 2 to 3 times a day and a protone pump inhibiter like Pantoprazole
once a day. If with these medicines you do`nt feel relieved pl get blood tests and xray chest done.