Wouldn’t you feel crappy from the other by-products if was candida feeding? If your stools are well-formed, aren’t an unusual colour etc, it could be a good sign. Lactobacilli can offer a lot of advantages, like lowering stool pH, ammonia content, pathogen numbers and inflammatory markers, but it can take time for them to have an effect. After 2-weeks they may have even exchanged gene clusters with your indigenous bacteria and brought about some interesting changes in the gut ecology. It’s hard to say, so I’m just throwing things out here. Maybe you could avoid it until your grains are ready, but if your stool looks good, that’s as good a measure as any, I think.