I Was Diagnosed With Pneumonia On Dec. 13th Placed On

I was diagnosed with pneumonia on Dec. 13th placed on antibiotic which I finished Dec. 26th. On Dec. 27th I had a follow up lung x-ray which indicated my lungs were clearing up. I am concerned that I am still coughing up phlegm that is on the green side. Should I still be experiencing this at this stage? Basically, I am trying to decide whether to call my Dr.'s office.