Hi there ~
I understand your concerns. I am glad that you stopped smoking
marijuana. The withdrawals from the substance could be varied and there is not a diagnosis with a set of symptoms for "marijuana withdrawal". I advise you to consult a local doctor to get symptomatic treatment for the issues. I also believe that you may need to consult a cardiologist
depending on the kind of chest pain
and palpitations you are having. I hope you do so as soon as possible.
I hope this helps. Take care and have a lovely day!