Does the chest pain feel at all like heartburn? It could be something like Gastroesophageal reflux disease.
The symptoms are:
Heartburn
Involves a burning pain in the chest (under the breastbone)
Increased by bending, stooping, lying down, or eating
Relieved by antacids
More frequent or worse at night
Belching
Regurgitation of food
Nau...
more