What could cause these bizarre symptoms?

What would cause cold/flu-like symptoms for three months?

• At the end of May I got a bad cold. After two weeks with no relief I finally went to the doctors. They told me I probably had bronchitis and gave me prednisone, cough syrup with codine, and an inhaler. The prednisone messed me up... I couldn't eat and it made me go into rages. The cough syrup gave temporary relief to my sore throat, and the inhaler gave temporary relief to the scratchiness. However, when I finished the entire treatment, I was no better and even got worse. Another two weeks later I went back. They gave me azithromycin. It's been three months and my symptoms are not going away. I have a sore throat half the time, occasionally I get a fever... as high as 102. But the worst part is the coughing. I can't stop coughing. And I'm constantly coughing up disgusting phlegm. I'm coughing so much that it's starting to cause serious muscle pain in my shoulders, upper and lower back, and sometimes abdominal region. A couple times I've gotten really bad stomach aches. These symptoms just won't go away. Every other week or so I have a day where I think I might be starting to get a little better, but then a couple days later I feel worse than I did before. I think I need to go to the doctors again, but I don't want it to be a waste of time because they didn't do much help for me before. They assume that if I don't have a raging fever every day, there can't possibly be anything wrong. I just want to be able to breathe, not cough phlegm up every 30 seconds, literally, and not have these back and shoulder pains. Anybody know what could be causing these symptoms that seem to be ever-lasting? Thanks! :)

• Answer:

  At this point I would check in with Mayo Clinic. There is one in Minnesota and it would have to be a lung specialist. I wouldn't wait around to go. It could be anything but deeper tests are indicated I think Good luck and God Bless You!