my advice? dont waste money seeing a quack. no one is 'allergic to own stomach acid' total nonsense.
go to GP ask for stronger anti reflux medication, for instance i take 2 types, one is a daily 40mg tablet an 300mg for night time.

flare ups with gut happen, i am severely lactose intolerant
other foods that really bring back symptoms are high firbre foods, and onions and of course booze, like wine!
Any gut damage takes a while to heal as we cant stop eating, so these things take time.