@fari9 - I also ended up in ER some years ago with Candida esophagitis. Thrush all way down. Also have GERD. At the time I was taking antibiotics frequently as well as prednisone now and then.
I thought I had a heart problem because of the severe pain.
At the time I was treated with antifungal medication.
Have you had another endoscopy to see why the pain is there? Reflux can cause a lot of pain.