You didnt mention your age.If you are young,most probable cause would be Gastro esophageal reflux
.It more or less simulates Heart attack
If you are elderly man,you should exclude Heart attack(Myocardial infarction/Angina).
Consult your local doctor
and get Upper GI endoscopy,Ultrasound abdomen and ECG done.Take complete course of treatment.
Hope every thing will be cleared.