Well it might not be candida that is reacting, it could be the other bad bugs in your body such as the cell wall deficient microbes, parasites, etc…
Ya this is raw buckwheat, roasted is called kasha (which i don’t recommend as being safe for the diet).
Time to rotate to something else…have you not had any problems with it in the past? How often would you consume it?
The yeast could be adapting to it, but you could also have bugs in your throat (right now), etc.