Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. Reviewing your history it seems that you might be developing CHF due to which you are getting short of breath with palpitations and having nocturnal cough. I would suggest you to get your echocardiography done as soon as possible and do get your BNP levels as well as it is a good indicator of congestive cardiac failure (CHF). Hope I have answered your query. Let me know if I can assist you further.