My daughter is 2 and a half years old and she's been dealing with a cold and cough since January. We saw a doctor who gave us some medicine, which helped with the cold but her cough hasn't gone away. She tends to cough especially at night while she's sleeping and again when she wakes up in the morning. We went back to the doctor and he mentioned that it might be early asthma symptoms and suggested we try LEVOLIN syrup for 5 days. He seemed optimistic and said asthma in kids can be cured with medicine. I'm really worried and curious about how common this is in young children and if there's anything specific I should watch for or do to help her. Does this seem like the right approach?