cardiac diseases, lung cancer, thoracic outlet syndrome,pancreatitis
,gall bladder disease(fullness and pain
in the right side of abdomen and chest after eating a greasy or fatty meal) and muscle pain[costochondritis(an inflammation of the joints in your chest)].
Try taking some anti inflammatory pain relievers and antacids.Heat compresses may also help. If the pain is still there,pls consult your physician to find out the confirmatory diagnosis.
Hope it helps.