You have gone through a lot over the past 8 months. It is time to find out WHY you are coughing and then to treat the cause. All you are doing is taking medications for a variety of things without a diagnosis. I would suggest seeing a Pulmonologist and discussing the problem. This could be from the upper airways (a sinus problem that started as an infection months ago) or a lower airway problem, such as the asthma and bronchitis for which you have taken a few medications on and off. There are many reasons for these symptoms. Now is the time to determine which one(s) is the cause and then treat effectively.
http://www.watercure2.org/ASTHMA.HTM
http://www.watercure.com
http://www.watercure2.com
The Cure = 8 glasses water/day & 1/2 teaspoon sea salt