Every so often (approx every 2 months or so), my 5 year old develops a cough that starts at night. She will cough and cough until she throws up and then after about an hour will eventually fall to sleep. The cough then stops until the following night . This normally happens over 2-3 nights. She is fine in the day - no temperature or anything and once has fallen properly asleep (after the hour of coughing) is fine in the night . As mentioned, this happens over 2- 3 nights then stops and then happpens all over again 2 months later. Doc not really shed any light on it. Anyone had this happen to their DC?