I lived in OK 20 years.. At least go to Oklahoma City, OU hospital.. if you can travel go further... Houston or go to Mayo in Rochester, Minnesota. Do not lie prone when you sleep. Prop yourself up at least with a wedge pillow and a few others to a 45 degree angle for your upper body.. raising the bed Head is the best so the whole mattress tilts. Don't lay down for at least 2 hours after eating. Don't eat for 3 hours before going to sleep... Don't eat fast...chew your food really well. I had a Nissen almost 5 years ago ..it was a disaster . Mayo clinic MN diagnosed my condition as post operative Gastropaneisis.. 1 in 6 Nissens fail...