You know what, the more I read about your case, the more it reminds me the shit I got the whole year until the doc found out what it was. Not sure if it was long enough to be chronic for you, but chronic coughing usually means 2 things and it is hard to find what it is usually :
- allergy to something, thus, an inhaler and stuff like that.
- gastric issues, which irritates the throat.
I was prescribed stuff for both, had to do an x-ray, nothing.
After 6 months I ended up to make a legion of blood tests to eventually find that I was positive to Pertussis (apparently coming back as I said earlier in the thread). I'm still recovering from it since it takes aaaaages to manifest itself, and then disappear. I just looked up the symptoms on wikipedia and apparently, it can involve The classic symptoms of pertussis are a paroxysmal cough, inspiratory whoop, and fainting and/or vomiting after coughing.[5] The cough from pertussis has been documented to cause subconjunctival hemorrhages, rib fractures, urinary incontinence, hernias, post-cough fainting, and vertebral artery dissection.[5] Violent coughing can cause the pleura to rupture, leading to a pneumothorax. If there is vomiting after a coughing spell or an inspiratory whooping sound on coughing, the likelihood almost doubles that the illness is pertussis. On the other hand, the absence of a paroxysmal cough or posttussive emesis makes it almost half as likely
So if you are coughing to the point of choking, or something unusual like that, keep that in mind. Considering the time it took them to understand what it was, and the fact that old vaccines are totally outdated now (I was vaccined...), well... I hope it's not that. It was annoying as hell, even if it was not really violent in my case.
edit ; apparently you already got one of the antibiotic against it.