Hi, my daughter is 7 years old and has had a cold off and on for about 4 weeks. She does not have a fever and her cough has pretty much gone away. She is still coughing up "green stuff" in the mornings and still having difficulty breathing. I took her to the doctor and x-rays were done. Dr. said the x-rays looked fine. Don't like seeing my daughter having a difficult time breathing and I don't think it's asthma....???