Hello, Since you have been diagnosed of having three ulcers in your esophagus after endoscopy, the cause should be treated. The ulcer can be due to infection (H. pylori), drug induced, etc. Your treating doctor should give you antibiotics to treat bacterial, viral, fungal or parasitic infection. He should stop all those medicines that may trigger the symptoms and make them worse. Nexium is a PPI used to treat stomach and esophageal problems. It relieves heartburn, difficulty in swallowing and prevents ulcers. You can continue to take it. GERD may cause pain or discomfort in the shoulder blades. Get GERD treated. Other medical conditions that may cause similar symptoms are poor posture, long working hrs in the PC, overuse, muscle strain or fracture / trauma, etc. You may visit an orthopedics, get clinically examined, get X-ray / CT / MRI done to detect the cause. Avoid taking food that triggers acid reflux, quit addictions if any, prefer taking boiled food over spicy food(for 1-3 months), maintain healthy BMI, stay well hydrated, avoid constipation. For relief you can take antacids and Acetaminophen, one SOS when required. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Nupur K., General & Family Physician