Thanks for all these additional details.
Sorry for the delay in answering.
I would make you clear that it is not related with acid reflux disease. If you have this condition, then antacid would have been useful.
In your case, this could be related with Costochondritis. It is an inflammation of the cartilage joining ribs to chest bone. It is this inflammation that cause the dull chest pains inside the chest wall. This would cause dull pain in middle of chest. Also such pain would not be affected with meals.
To treat this condition doctor advise for medications. These are-
-Non steroidal anti-inflammatory drugs like- Motrin, Naproxen ,Aleve.
-Antidepressants, specifically tricyclic antidepressants, are very helpful.
-Muscle relaxants, are also very helpful in such cases.
Also your doctor can advise for Chest X-ray. It is not related with heart disease or any other serious issue. No need to get panic.
I would recommend you to consult your doctor for clinical checkup and get appropriate management.
I hope this helps.
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