I've had a heart murmur since birth, along with chest pains. could this be the result of an enlarged heart now? no one knows what is causing my pain.

It could -: You may have congenital heart defects 'hole in your heart' that could cause cardiac enlargement and irregular heart beats or mitral prolapse syndrome with mitral regurgitation (irregular and backflow that can cause cardiac enlargement and arrhythmia as well) -- please talk to your doctor or see another cardiologist for more evaluation and other treatment options -.

Possibly: There are many conditions that cause murmurs at birth some of which can lead to long term problems, but others are harmless or resolve spontaneously. Chest pain is not a common symptom of congenital heart disease. A thorough evaluation is necessary to know more detail. Particularly in younger patients, the heart can often be excluded as a cause of chest pain.

Unlikely a big heart: Valvular diseases cause murmurs, and are usually not accompanied by pain. Innocent murmurs are common, are often present since birth and cause no dysfunction. Chest pain an adolescent is almost always (999 times out of 1000) either costochondritis (rib/breast bone inflammation) or anxiety/panic. See your doctor but calm down. You'll be ok.

See your doctor: You should know more than just that you have a murmur. Is it an innocent murmur or do you have heart disease? See your doctor about your chest pain, and find out exactly what, if anything, is wrong with your heart. It is important to know your medical history.

Chest pain: From what you write you must of had a cardiac work up. You don't mention the type of murmur you have so i'm assuming you have a functional murmur. If you are slim in build your chest pain can be explained by a thin chest wall. Your heart may be bouncing off your chest wall like aping pong ball giving you a sensation of pain, in which case it's nothing serious.