Hello Dr, My Daughter Is 16 Months Old And From

Hello Dr,
My daughter is 16 months old and from past 1 month she is suffering from cough .Initially I gave her home remedies but when I see not much relief I gave her levolin and allegra syrup but after that her doctor prescribe her pulmoclear for 7 days .She was fine after this course but now again from last 1 week she developed cough n vomiting .what should I do??