Fermented pre/probiotics not making me feel quite right

Does anyone have difficulties handling fermented foods such as Apple Cider Vinegar, Kefir, and Saeurkraut? I use ACV sparingly and coconut water kefir often and, though they give me energy and often make me feel good in some ways, they also make me mentally "loopy," which is to say weak, forgetful, racing mind, and cloudy-brained, and even a bit manic. I simply do not feel balanced with them.
I do not believe this is due to Candida or bad bacterial growth and I believe I have pretty much licked my issues with those. I have been taking ACV and kefir for some time and would have noticed an improvement in my ability to handle them. So I am wondering if the acidic medium simply doesn't sit well with my digestive tract and throws off it's "balance" or "ecology." Maybe it just isn't for me.
By the way, might anyone know how to counter this effect? Tweet