It can be COSTOCHONDRITIS, an inflammation of the joints in your chest. Costochondritis usually goes away
on its own. Try an anti-inflammatory medicine to relieve the pain
. Heat compresses may also help.
If the symptoms persist then get an evaluation done from a physician.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor.