Eventually after much reading I read that without enough stomach acid, food backs up and causes reflux. It also causes the LES to not close properly. So I started taking Betain HCL and Digestive Enzymes (Solgar ones) before I eat and I can't tell you what a difference it's made. It's so amazing. I get 0 symptoms and I also feel so much better generally.
I honestly encourage you to try this. The medication for this stuff just has it the totally wrong way around. I can't believe this stuff is given out as one of the most commonly prescribed drugs in the UK at least.