Hi and welcome to the GERD forum.
I am so sorry u r having this problem after surgery, and I have no words of wisdom or advice.
I pray someone else here may have an idea that may help u.....
Please keep us posted on ur progress
"selma"
See and Internist. Ask about taking Malic Acid with your meals and taking Digestive Enzymes just after. Your gerd may really be due to a lack of acid and or enzyme production. Then ask to try to be weened off the antacids. Good Luck!