I don't mean to sound negative but you may be feeling better just from a lack of food you had during your endoscopy prep. I've had reflux for 10 years and if I skip a few meals, then I can eat and not feel the indigestion for a day or 2. I take Protonix for my reflux and still feel a little indigestion if I eat 3 times a day. Food causes the indigestion and the more food you have in your system, the more acid is being produced. That lack of food may have slowed your acid production enough to make you feel "good". Also I have never been a coffee drinker but I do know that it does make it worse...but the one thing that has always made my indigestion really tough is chocolate. I used to love it but I never touch it now because I know how bad it's going to make me feel. And I mean like 2 M&M's and my stomach goes crazy. Just letting you know from experience. Hope you keep feeling good.