Do you have Barrett's esophagus? If it is present you could use that as a factor in your decision making process, to help decrease the risk for esophageal cancer. If not stress that you want to prevent it and politely demand a referral to a surgeon who specializes in hiatal hernia repairs. Like you said you're the one who is suffering and long term use if proton pump inhibitors such as nexium and prevacid have detramental effects to our bodies especially neurologically. I know this from personal experience. Good luck.