Do you have any back or rib issues ? A dislocated rib at the vertebra can cause the rib where it connects to the sternum to be very tender. I have a rib that can easily get out of position in my back and cause me chest pain. I also have a history of hiatal hernia that causes chest pain. This is where the top of the stomach squeezes into the diaphragm and gets stuck. I have also had esophageal spasms from similar vertegra issues. All three of my different causes of chest pain have resulted in getting EKG's done 'just in case.' Twice they even did stress EKG's on a tread mill. Fortunately, my health plan at the time covered the EKG's completely. It was nice to know I have a healthy heart.

A physiatrist or osteopath may be able to help or a very good physical therapist who can manipulate your ribs and back.

My best to you.