Age is not mentioned but anyway major issue is obesity, palpitations, tachycardia left side chest pain , check holter , 2 d echo ,
thyroid profile , try loosing weight if canât make , consult dietitian, gastroenterologist. You can consider for bariatric surgery yes GERD is due to obesity and I think you snore during the night time when I consider your BMI.
Next Steps
First consult cardiologist, and gastroenterologist,endocrinologist dietitian, self motivation and donât loose hope kill your procrastination