I had chest pain
that went undiagnosed for 2 years. Then they discovered a herniated disc
in my thoracic spine that was causing the symptoms. Anemia
can also cause chest pain. You need to schedule an appt. with your Dr. to start investigating the cause. ER Dr.s will only treat your presenting symptoms, and if it's not your heart they really won't investigate further because it's not life threatening. So you really need to see your family doc to get started on this. Good luck to you!