We are in the same boat too. I just posted a question summarizing all of our things, but our 2 1/2 year old has had it 9 times, been hospitalized multiple times, the rigid bronchoscopy is OK, no acid reflux. We are going crazy too. Please let me know if the pediatric pulmonologist or the immunologist have helped. These are 2 roads I am looking to go down too.
Hey my five year old is identical. We have had an extensive work up with no answers. Have you made any progress with a Diagnosis? Lets keep in touch...