Such chest pains are often due to costochondritis or intercostal neuralgia. You have not mentioned if you underwent ECG to rule out any heart problems. Pain due to costochondritis or intercostal neuralgia responds well to medication and injections called intercostal nerve block.
Next Steps
First get ECG done to rule out any heart problem. Then consult a pain specialist if no heart problem is found.
Health Tips
Do deep breathing exercises and spine stretches an extension once pain is decreased.