Hmm, well then Im not really sure. Im sorry I couldnt be of more help.
i did go, they did x-rays, an ultrasound, and did a heart photo thing i didnt know what it was but they said they couldnt see anything and it was the ultrasound that they said it was a cartilage build up
Its possible that it is a hiatal hernia. You really should go to the doctor. One because you are having chest pain and that should never be taken lightly, but two because I have never heard of cartilage building up on the chest. I have heard of scar tissue building up due to injuries or surgeries, but I dont think that would cause chest pain. You might want to be safe and go see your doctor and find out what is really going on.