What Causes Severe Dry Cough, Wheezing And Cold In A Child?

Hi good day,my 1 year 1 month old daughter,suffers alot of wheezing,high fevers,followed buy a dry cough that turns in to a mucus cough, when she has a cold,she was treated for bronchitis at 2 months of age,since then treated 3-4 times for the same thing in south africa,she has a twin brother,who doesn't suffer nearly as much as she does. They were both born between 35-36 gestation in south Africa,she was 2.24 kgs at birth via caesarean,we are currently living in Thailand the past 3 months. My family has a history of asthma,my 2nd eldest son has it & my self. When we visit the clinic,3-4 times already,the doctor provides the exact same medication,for sinus,cough,fever. Please can you help me with a suggestion what to do,from experience with my eldest son (7) I'm worried its also asthma.