I have bronchitis and cough until i vomit, should i be concerned?

See below: This depends on the duration of symptoms, severity of the symptoms, associated symptoms like respiratory issues, and age. Bronchitis simply means - inflammation of the bronchi! it is not always bacterial (as is often assumed in the lay community). Furthermore, vomiting or gagging after coughing (post-tussive emesis) is actually protective as it is likely removing mucous from the throat and gut.

Pertussis: Might be pertussis, check with your doctor, usually not dangerous in adults, but quite uncomfortable, however you might need chest x-ray.