Less that 6 ft tall and weighing 295 lbs! Your slow heart rate is fine and your symptoms are not caused by bradycardia and you have no evidence of heart disease. Heartburn is certainly characteristic of esophageal reflux, but you don't say whether this is being adequately treated.
You are grossly overweight. How about tackling that problem if you are interested in your basic health? After all, your weight is a significant threat to your long term wellbeing. Note that heartburn is made worse by coffee and alcohol.
Please be aware that I am unable to diagnose medical conditions online.