Constant cough despite azithral. Worse.

Hello, my daughter is 5 years old. Weight 21.6 kg.Had been struggling with cold and cough for 2 weeks. Took her to ENT and since she had a throat infection and irritation, we started her on azithral 100 syrup, 2.5 ml once a day and chericof 2.5 ml twice a day. Her cough now has increased and especially in the night. Before this it was only in the mornings mostly. I'm worried and not sure what to do. She gargles. Her chest is clear though and her phlegm is white. Earlier she had wet cough. Now it's a mix and am not sure. We tried ascoril for the first 5 days but from the day before giving her chericof on ENT advice. She's active otherwise. worse. Will she need levolin or something cos we have done that in the past.Please let me know what to do. I'm very anxious it should not get worse. Thank you