I'm sorry you have had such difficulty. I would go BACK to the doctor to discuss. I'd also consider another medication. There are many to choose from. To cover your heart worry, lose some weight if you need to. I had horrible gerd until I lost weight. Even 10 pounds can greatly affect it and help. Also, eat earlier in the day with any meal consumption not being later in the night. Lay off fatty or process food or things that are acidic (red sauces like spaghetti, pizza, chili soup, etc., pickles, etc.). And exercise daily for thirty minutes or more. These things greatly improve health.