I have acid reflux. I eat raw foods and one thing I like to eat is raw or blanched almonds. One day after lunch I realized after eating a handful of almonds that there was no heartburn for me. That's when I realized that almonds can be good for heartburn.
I just ate a few almonds and felt more pain as they went down and then - poof - total relief about 5 minutes later.
These worked for my heartburn as I am in my 7th month of pregnancy, but I sure did get sick of them. I have also have read that too many nuts can cause constipation which is also a problem of late pregnancy, so be careful. ACV and baking soda work not so well and the taste is awful with a burn of their own.
Eating a handful of raw almonds stops GERD dead in its tracks. My daughter ate almonds throughout her pregnancy whenever heartburn hit. It worked for her also.