Just wanted to point to a big tangle of vines here in the Jungle and that's the word "natural." We follow a number of the doctors who work in the field by using "natural" to mean hormones that are identical to the ones your body makes and use "herbal" or something like that for the supplements.
So, Premarin is not "natural" though it's from mare's urine while Prometrium IS "natural" though it's synthesized from wild yams. Honestly, sometimes I think they sneak in at night and grow extra vines here in the Jungle on purpose.
Reflux is probably from menopause itself. If you want an explanation, there's an article I wrote a while back on the changes that happen in the digestion
So, I'm with sun-worshipper. I think I'd make a go at some of the bio-identical hormones that avoid the first pass effect through the liver. Either patches, creams, or things that dissolve in your mouth, depending on how high the liver enzymes are of course.
About the supplements, well, they're always worth a try, but they just aren't hormones, so the degree of protection is lower. It so happens I researched these too. Promensil is really red clover
and Remifemin is black cohosh (my favorite)
You might add some tofu to your diet also. Yes there's a soy article too.
Whole soy protein that's been fermented does add some protections and some help with hot flashes.
Let us know how you do on the herbs.