My son has been experiencing the same thing nearly 6 days know, I finally remembered what helped in the past was activated charcoal (had already tried taurine, probiotics, advil, magnesium) I pulled it out and gave him two capsules about 20 minutes later =calm. Took him off the edge. but had to wait two hours before you can give anything else.
Activated charcoal and oldie but a goodie.