a) you should ease down on the PPI and reduce them...you cannot  just take it off...

b) long term GERD might either cause erosion in your esophagus area...and inflammed it....

c) part of the reason is your LS lower splincter muscle is relaxed state...where it is unable to close when you are processing food.
So retraining your eating habit time is important.

d) food diet...know what you eat , how you eat them, when you eat them.

e) alkaline food...dont overdose if you are low on acid already...but you can do a simple inaccurate test using "baking soda".

Am i all talk?..No..I had GERD 10years+, ...quit a stressful job, took a short pay cut, did contract work, change my lifestyle and my eating habits...and resolve them in < 1 year.

The PPIs and etc....they don't help you recover...it just elevates your symptom.
I also did chinese medicine from Tung Shin.

The rest is your decision. All the best.