Stomach acid/digestion question

yirara

I'm suffering from occasional reflux flareups, and my GP mentioned the other day that it might as well be caused by too little acid and PPI might be a very bad idea based on the reflux patterns I'd observed. He suggested a baking soda test that was negative, and based on his recommendation I bought betaine hcl capsules. Since I'm taking it I notice some oddities in my weight. I'm eating as usual (been maintaining for over a year).

Since starting to track my weight daily when I started my weight loss journey it was always a bit higher come Thursday to Saturday (water weight), but for some reason this peak has been missing, and my weight is actually lower now than Wednesday, when I started with these pills. Is there any explanation for that? More acid - better digestion - more calories absorbed I'd think. Or less gasses due to less fermentation?