Infant cough

My daughter will be 5 months this week...she started out with a temperature last weekend with no other symptoms, then last Tuesday developed congestion and a cough. Should I take her back in to the Dr? They looked at her east and said they were clear...she’s been messing with the left some..as if she’s trying to scratch it...I do see some wax way back in there...could this be just itching her maybe? What should I do?