I have cough for years, mucus, breathing problems and back pain on the left upper and mid side of the back and chest pain. I had any kind of tests done including CT of the chest and it's all came negative. I don't know what else I can do. Plus my boyfriend has a sane symptons now. I had done stress test, echocardiogram test, bravo test -acid reflux, motility test, endoscopy test, allergy tests, sputum test .....I don't know what to do anymore ....Please help! Thanks