Have your doctors told you that the pain you feel is associated with heart? it could be a pain of cardiac origin, respiratory origin, gastric origin or may be local muscular lesion. A chest X-ray will be the first invsetigation of choice after the clinical examination. Echo to analyse heart function. the pattern of pain you are referring is associated with breathing, so there are chances that you have developed some chest infection
so again we need a chest x-ray for that.
The pain of cardiac origin generally is irrespective of position so in my opinion it is not the case, it could be LRTI, or case of excessive flatulence
. So kindly consult your physician once again with this set of complaints and if X-ray is already done then we may have to go for more specific investigations like ECHO, MRI
, CT-Scan etc. You may consult a Homoeopathic Physican also for the treatment of choice.
Wish you Health and Happiness