Persistent Dry Cough In 6 Month Old My 6-month Old Baby Has A Persistent, Dry Cough?

My 6-month old baby has a persistent, dry cough? - persistent dry cough in 6 month old

The cough is dry, no mucus at all. Sounds like a laugh, as Bert-Bert and Ernie. She coughs, especially when she stands or excited. My husband and I are recovering from a cold ... Leaves in the morning, doc. Cough comes and goes, but if it happens sometimes just goes on and on. It seems to laugh and to clean the throat. Any measure that ... or Just Let it go now?