cannot say in your particular case, but generally, non-cardiac pain is pain from soemthing other than the heart. ANything in the vicinity can hurt for many reasons. Mostly, it s the muscles of the chest and muscle pain medicine over the counter like acetaminophen is often helpful. It can be lung irritation in a minor lung infection that usually goes away on its own. It can be esophageal or stomach irritation and an antacid will lower it in a few minute s but other medcines are loften needed long term and it often stays if it is gastrointestinal in origen.