I am wondering the same thing, are you taking it on an empty stomach? I would avoid taking any supplement without food, it also helps aid absorption. Maybe have a look at reviews and see what everyone else is recommending, not just for reflux but also quality and reliability. I never fail to research before I make a purchase. I found this to be the best website phrmreviews.com/r/alldaychemist-com-review-reliable-store/
It has heaps of information and should put you on the right track. Hope that helps!