Dear Largenicholas, hello.
Heart burn can be due to increased acidity in the stomach. Acid HCl is secreted by stomach normally. Eating spicy/oily foods, remaining empty stomach, stress
, alcohol, smoking
, few medications like pain killers/ steroids
, etc can result in increased acidity.
Get yourself fully examined including ECG and take antacids under medical supervision.Take proper precautions as mentioned above to help in control the acid secretion.