I agree with Mel. Last post you said that you were coughing up lots of gunk, culturing MRSA, and certain your doctor was going to put you into the hospital again for IVs, now this post you say that you can't cough up sputum because it is too thick, your culture is normal, and your doctor refuses to treat you. You need to take the advice that everyone on this board consistantly gives and find yourself a CF doctor to confirm your diagnosis and get your CF care on track.