Drinking water kefir and experiencing symptoms

Hi for the past 3.5 weeks I've been taking water kefir. I started initially on 1-2 tablespoons and currently drinking around 5-7 ounces. When I first started water kefir I had intense bloating, burping, gas, and some brain fog which I assume is a normal part of the die off process. The bloating, brain fog, and the burping have mostly all resolved. Along the way I did loose weight too like around 5-6 pounds. Just a side note from 2022 to June 2024 was an intensely stressful time in my life and did gain over 20 pounds due to the stress. So perhaps there was a ton of bad bacteria overgrowth. However, I am noticing for the past 4 weeks that I've been getting loose stools like flakes. My first bowel movement is usually decently formed with some flakes. However my second bowel movement is pretty mushy and loose. I was wondering if anyone else experienced this and can it take this long if not longer for the gut to reach a balance? Thanks