Hello Ousaima,
thank you for sharing that fascinating case story!
Your system decided what response fit best the situation. Perhaps the "good one" in the group you wanted to leave compensated the need to let go of them?
When you at last cut the communication that was both a resolution and a stressor right? That must have created a KCT syndrome.
I share the view that the diarrhea attacks were rather healing peaks, but as you didn't understand META.Health yet, they also became new stressors! Therefore, the sleep quality wasn't good. 
Nightly sweating after these conflicts indeed points at microbial action to reverse tissue growth in the gut or in the kidneys.