Hi again
The exact title of the book I mentioned is Heartburn and Reflex for Dummies. Good clear explanations and chapter 6 deals with what you should and shouldn't eat. It divides foods into red, yellow and green according to how damaging/helpful they are to the oesophagus. I started with only green foods, and introduced yellow ones gradually. I'm still a bit careful with some of the red list, like raw onion and chocolate, although almost anything is OK on the odd occasion.
I agree with what Ange says above. Avoid citrus everything and cranberry, plus tomatoes, onions, leeks and be careful with garlic. If you think of sharp or acidic tastes in fruit, these are the ones to avoid. Pineapple was bad for me. Berries are in the middle and the fruits least likely to cause a problem are bananas and apples.
In vegetables, peas, carrots, baked or boiled potatoes, broccoli, green beans and cabbage are all OK.
One tip is to eat a couple of spoonfuls of plain yogurt at the end of every meal as it leaves a layer of bland food at the top of your stomach. That wasn't official advice but I did it and it seemed to work.
And avoid very rich, fatty or greasy food. As little butter as possible. No cheese at first. No ice cream. No rich sauces.
Nothing extremely hot or extremely cold. No scalding drinks and no ice.
Absolutely no Coke. And avoid fizzy drinks. Try to avoid alcohol. I found Prosecco and white wine particularly bad. A little light red wine was easier to cope with. I gave up caffeine and drank roobois tea instead, in fact now I prefer it.
I agree with eating smaller amounts and not late in the evening. You don't want to be trying to digest food while lying down.
I found a wedge pillow a bit awkward so I put bricks under the head of the bed and that worked for me.
It does take time but it is so worth sticking at it. It should really help. And once you've got it under control you can ease up a bit and eat more of what you want.
Best wishes 