Persistent productive cough for more than 1 year!

Hi, my name is Blaine, a 70 year old man. I have several issues with my mind, body, soul, +. I am here, hoping to find some answers/cures for what has disrupted my entire being for what seems like an eternity!
I would like to take one issue at a time, so I don't get confused, overwhelmed and frustrated! About a year ago I developed a productive cough that at times I cough so hard I pass out or I am unable to take in any air, so I am struggling to breath, my throat starts to get dry, so now I am gasping and seem to have no control over what is happening. This will sometimes be very persistent, then again, I might not have an episode for an hour or so. I have been to a Pulmonologist, had several tests done and COPD, Asthma, etc., basically all the tests that should be taken, have been with no prognosis. Like I said in the beginning, I have several issues as well as concerns and I don't want to be bombarded, so I would like to ask your help one item at a time unless anyone feels that all my symptoms are a packaged deal and that one thing might lead to another. I would like to thank you all in advance in hopes we will be able to help one another! Please let me know, if more info. is needed and I shall provide what I can! Blaine Summers