My daughter is 3.5 months old she is suffering from cough since 2 months and her pediatrician prescribed for levolin 1 ml 3 times a day for the first one month nw from second month onwards leolin 1 ml and mucolite .5 ml Each 3 times a day but no difference . Cough is not going and some times it gets worse especially at mornings she is not even able to drink milk. What should ido