Conversation: The conversation between human and AI assistant.
[|Human|] For the last day or so I am experiencing pain on the left upper part of my chestand back just above my breast level, have had a persistent cough for the last 3 weeks without a cold but coughing up heavy mucous, since yesterday the pain has become increasingly severe and have difficulty breathing, and movement in the left arm
[|AI|]  Hello dear, thanks for your question on Chat Doctor. I can understand your situation and problem. Left sided chest pain should be evaluated for cardiac cause first. So get done ECG and 2d echo. If both are normal then no need to worry about cardiac cause. You are also having coughing with phlegm and breathing difficulty, so pulmonary causes like pneumonia, bronchitis etc. can be there. So better to get done chest x-ray and PFT (pulmonary function test) to rule out pneumonia and bronchitis, respectively. Better to first diagnose yourself and then start appropriate treatment.