any idea?

[sahra29]

im a 29yr old female. experiencing pain behind rib cage on my left side. (it began in right side) now i am getting slight twinges in upper chest, what could this be? Heart disease runs in my family.

[kenkeith]

You may be super sensitive based on a family history of heart disease,  there are many causes for the symptoms you are experiencing, but if the don't improve or go away you may want to talk to your doctor or nurse.

The source of pain may arise from a variety of potential sources:

•the chest wall including the ribs, the muscles, and the skin; •the back including the spine, the nerves, and the back muscles; •the lung, the pleura (the lining of the lung) or the trachea; •the heart including the pericardium (the sac that surrounds the heart); •the aorta; the esophagus;
•the diaphragm, the flat muscle that separates the chest and abdominal cavities; •referred pain from abdominal organs like the stomach, gallbladder, and pancreas.