In 2014, exactly 3 years ago now, after few days of doxycycline (after being symptomatic since childhood and didnt take any antibiotics that I'm aware of since i was 10, and before that also almost none), I had severe herx --- it was like someone throw me against the wall, from 5 meters, I got twitches in my muscles, electricity through spine, severe arhtritis in my knees, rages, headache, fibro (first time in life), burning all over skin. All my muscles were twitching nonstop.
Most of those things went away except constant frontal headache - 24/7 for 2years. Stabs through head..
some cognitive symptoms improved but overall I'm worse because of worsening of CFS (my guess)
It seems it was genuine book case Herxheimer but unfortunately the killing just flared autoimmunity, and then I wasnt aware of ME/CFS even. Now when I tested CellTrend it is very high , 8/9 positive. I dont know what would it be like then, but probably also high because I have 20 years of CFS symptoms.