Hi, Welcome to HealthcareMagic Forum.
Apart from chest Pains, what other symptoms do you have? Does the Pain increase on touch? Since all your Reports are Negative for any heart ailment, it could be
Costochondritis or
Tietze Syndrome. It is the Inflammation of a rib or the
cartilage connecting a rib. It is a common cause of chest pain. Kindly get yourself examined by a Orthopedist as you need a thorough evaluation to confirm it. Don't worry it is not a serious issue though. The cause could be,
Injury or Physical strain,
referred Pain, Infection or Upper Respiratory Illness. You will require analgesics or antibiotics if you have a Infection, Anti depressants or Muscle relaxants.
Get adequate rest, avoid activities that aggravate your Pain. Do gentle exercises like swimming and brisk walking, Don't overdo it, and stop if exercise increases your pain.
Apply a heat pad to the painful area several times a day.
Once your pain is gone, take it easy. Slowly work your way back to your normal activities.
Wish you Good Health, Take Care.