Did the bad effects occur suddenly after months of intake? What made you decide to take the raw kefir and raw sauerkraut together? Wouldn't it be better to take one first for awhile and observe the effects? This way you would know any issue would more easily be isolated to one substance? Could it be that kefir and sauerkraut are a bad combo?Months and months of raw Kefir and Raw Sauerkraut only made my brain fog worse, my muscles achy, and my face look like a living dead.
And maybe you're right too - that there's no such thing as bad bacteria. Maybe after months of intake of the "good bacteria," they become so plenty and established a quorum, which made them more dominant, and just like any good person amassing great power they end up using that power in very malevolent ways. Gone berserk and drunk with power so to speak. What's important is a balance of power a la Star Wars.