Had u/s, hida scan, bloodwork, upper endoscopy all normal but still having episodes of chest pain in breastbone, any ideas on what it could be?

Causes of chest pain: Musculoskeletal trauma (knowingly or unaware) is common cause includes muscle strains, rib contusions or fractures. Costochondritis or inflammation in anterior ribs can be quite painful and is self limiting. Shingles, viral infection, most often appears as a single stripe of blisters that can wrap around torso in distribution of rib. Pleurisy, inflammation of lining of lungs, can cause rib