"The key symptom is pain-not in the center portion of the chest under the breastbone, which is more typical of heart related pain-but rather pain along the edges of the breastbone. Many patients, and even doctors, can occasionally be thrown off as the pain can radiate into the arms, shoulders, or across the entire chest."
That describes my pain exactly. Basically, it's a inflammation of the cartilage where the ribs join the breast bone. It'll last for about 6 months, and the answer is taking Mortin or Aleve twice a day, and no heavy lifting.
So! Kind of a pain, but it won't kill me. Yay!