Cough-when to call?

battybtags

DD (and I) have both had coughs for a good 2wks now-maybe longer. Hers sounds like a phlegmy cough. She has had a runny nose (clear) on and off during that time. She might have had a slight fever one night over a week ago, but I didnt take her temp-it was bedtime and she just felt warm to me. I'm just wondering when a cough is just a cough (allergy related?) or when to call for it. I guess I keep waiting for other symptoms, but nothing has really reared its head