In the context of your symptoms and the reports upper abdominal pain and left shoulder pain or not associated symptoms. Kindly explain if the pain is related to your meals or exertional symptoms. They can be associated with gastritis or addictions if any. Kindly consult a Gastro medicine for above-mentioned symptoms. ECG echo and TMT has good sensitivity to rule out Cardiac’s symptoms.
Next Steps
Avoid spicy foods, stop addictions if any, take antacids.