Persistent Cough, Pneumonia, Bronchitis, Have Asthma, Sleep Apnea. Done Inflammation CRP Test. What Is Wrong?

I have had a persistant cough for 2 years now after a about of pneumonia and bronchitis. At first I thought it is just lingering after the illness because it was a bad one. I do have asthma but no allergies. My asthma is the type where ones body produces extra mucous. I cough up white thick sticky gunk and sometimes it has a pale yellow color. I have noticed at times my voice gets hoarse, not bad but I can tell its differant at times. I have had multiply chest xrays, i have had a chest CT scan and the only thing it said in the report was this: Few upper limits normal sized mediastinal lymhph nodes slight increase in size from the Octoaber 2010 CT. I know when they run the inflamation CRP test its like around 11 something and I know the normal is below 1. No one is giving me an expanation. Could this be just my next stage of asthma or something else. my family history is my dad died at age 51 of a heart attack, My mom had her 1st heart attack at age 41 and died of congested heart failure at age 68, my half brother died at age 58. I am 50, I don't smoke, drink, i am morbidly obese and just got diagnosed with sleep apnea and RLS. I have had so many respitory illness such as bronchitis and pnuemonia I can't even begin to count. I have had 2 sinus surgeries. My cough is embarresing and I want to know why I am coughing. In 2010 I believe was the year, I received a brand new prescription that had Methascopolomine Hydrobromide in it, after 20 minutes of taking my 1st pill of this prescription I was having stroke like syptoms and ended up in the ER room and hospital overnight. A pharmacy accidently overdosed me with methascopolomine is what the ER doctor said is what happened. It was about 1 month after this episode i came down with a very bad bout of bronchitis which turned into pneumonia. Could this play into my persistent cough? I have seen several doctors over this and no one seems to care to find out the cause. Should i let it go and just deal with it or shall I keep searching for a reason. My thought was-if it is like cancer-lets nip it in the butt but so far i learned nothing.