I believe you are going to undergo the operation, but realize that this is not necessarily a complete cure. Your surgeon should have informed you that a lot of patients end up back on acid reducers at some time. I'm only saying that the reflux action of the stomach is not caused by acid.
Even after getting the fundoplication (mine was a Toupet) I have reactions to my food intolerances. I get jumping around stomach (trying to reflux) and sometimes tachycardia.
Being a vegetarian doesn't exclude you from food allergies/intolerances, and you can be lactose intolerant and also have a problem with the milk proteins. I have a problem with most yogurts, which are often considered safe for lactose intolerant, because they often add powdered milk - which may contain sulfite.
Vitamin D needs to be corrected with the formula: for every 1ng/mL deficient you add 100 units of D. I had a level of 18, needed to add 3000 units to get to 48 in the new recommendation of 50 to 80 from Mayo.
My personal list of intolerances (from sulfite), which does not contain much meat:
Bagels, commercial Bread
Bottled Juices – especially containing grape, lemon or lime juice
Brown Sugar, White Beet Sugar (all brands not labeled cane)
Canned Soup, except Progresso Light Chicken Noodle or Beef
Cheese, especially hard cheeses
Chocolate, especially dark
cookies, especially chocolate chip
Corn Starch (fillers in gravy, pie filling, some medications)
Corn Syrup, dextrose, maltodextrin
Dried Fruits – except prunes
Eggs, if more than 1
French Fries, packaged mashed potatoes – no reflux with fresh potatoes
Ice cream, Sherbet
Jams and Jellies (pectin) – no reflux with the raw fruits
Milk, powdered – used as filler in “all milk” yogurt and some skim milk
Mixed Spices, especially with pepper
Packaged, Cooked Meats
Pizza (crust, cheese, sauce, toppings)
Puddings, Pumpkin Pie
Sodas (more than 1 cup)
Tea and Herbal Tea (few brands)
Tuna, some brands, canned – containing soy
Yogurt (more than 1 cup) especially low fat varieties (powdered milk added)