C.A.
My pediatrician's criteria is two weeks with runny nose (green/yellow vs clear) and coughing (increases at night - wakes/keeps them up). At that point they may prescribe antibiotics for a sinus infection (which was the case for 9 month old - although she was teething as well - a double whammy).
Maybe wait it out another week? But you can always call the doctor to get their input/reassurance. It can never hurt!