I had an endoscopy 2 weeks ago to check for coeliac disease. The procedure went well and I suffered no immediate effects. However, I am experiencing heartburn the last 10 days, something I have not had before. It is particularly bad at night. The upper endoscopy was normal and I am awaiting the results of biopsies. Could the endoscopy have triggered this or is it another development of my B12 deficiency? Your thoughts/advice would be greatly welcomed. Thanks.