Cough and cold. 21. 5 kg. please advise.

Hello, my daughter is 5 years old. She has had a bit of cold, sneezing running nose and fur the jar one week. I am giving her montair lc 5ml a day for the last ten days. Her cold and running nose has gone. However she has cough with mild phlegm.i gave her brozedex 5 ml for 3 days And stopped. The cough has increased now though. More frequent. Mostly during the day and evening. Nights she has a bit of a nose block. She's active otherwise. No fever, no other discomfort. It's been 11 days though. Her chest doesn't seem congested and there are no vibrations when she sleeps but there's mild phlegm which she swallows. Can I give her brozedex again or should I take her to the clinic. Please let me know. Her weight is 21.5 kg. Please advise. Thank you.