Thank you for your interesting question, and I am sorry to hear about your medical issues. In order to provide an accurate diagnosis, a physician would need to collect a full medical history and perform a thorough physical exam. You may need additional testing, as well. Therefore, it will be necessary for you to schedule an appointment with a primary care physician
for further evaluation.
Your chronic phlegm production could be caused by several different disorders. Chronic sinusitis can lead to persistent post-nasal drainage, which often causes patients to spit up phlegm frequently. A blockage or abnormality of your esophagus can lead to reflux of material. Abnormal function of the esophagus, such as achalasia, can lead to difficulty passing food, liquids, and saliva.
Your chest pain and shortness of breath also have many potential causes. Frequent vomiting
can cause costochondritis, or muscle pain
in the chest wall. You could have damaged your esophagus leading to a Mallory-Weiss tear. A myocardial infarction, or heart attack, often causes chest pain and shortness of breath. A weakness of the heart muscle, such as in congestive heart failure, can cause similar symptoms. Finally, other disorders such as pneumonia and pulmonary embolism can cause such symptoms. I strongly encourage you to discuss these possibilities with a primary care physician.