My gluten intolerance was very neglected unknowingly which caused me ALOT of issues.....terrible burhing in the stomach was one issue. I was taking two Nexium and day and it ws not enough.I was doing 2 does of Pepto in between. I have been on Nexium now for 5 months....when I try to go off the burning in my stomach comes back. I too have found relief from alcohol but I wonder if that is because it numbs things? I also was having a terrible stiff neck which nothing seemed to help.....I tried all kinds of different exercises.I was having chest pains and heart palpitations, was not sure what was related to what. Kept tightening my gluten-free diet to the point of only eatinglabeled "gluten-free" oats and the like, reading seasoning packets, eating no gravy, etc. Realized I was having a reaction to high fructose in the process of all this. The more I tightened my diet and stayed away from glutens and high fructose, the symptoms you described did go away. I am still on the Nexium as I am just trying to make sure my systom is healed and not bothered by acid. I have been able to cut back to one a day without the Pepto. This all took time, a very slow process.
I was considering that fructose malabsorption was a likely suspect. I recently found that cutting tomatoes from my diet completely reduced the heartburn significantly and cut my trips to the bathroom to a normal amount. I'm on Sucralfate for the heartburn and it seems to work okay. I'm planning on scheduling an appointment to get a hydrogen breath test, which is apparently the test for fructose malabsorption.