<s>[INST] I am 40 years old, I weight 120 lbs., eat healthy but can't seem to let go of chocolate.  I sometimes get heart palpitations or my chest hurts when I cross my arms or when I lay on my side.  I've already talked to my doctor and she doesn't give me answers, help!! [/INST] this may be due to muscle strain, if you want to check about your heart then do thread mill test K if any chronic angina there also it will detect. palpitations occur when your heart beat faster and harder. may be during exercise also it can occur. if chest pain specifically tight radiation to shoulder or neck you should worry </s>