If your not excreting the toxins (even small amounts of them)then circulate and can cause anxiety,paranoia, suicidal depression. I had this happen, I got through it and im fine.
I dont believe anxiety comes from brain-damage at all, or I would not be functioning right now.
Toxins might be your issue, or it might be that you have conflicting things in your system.
Either way, it wont last forever and you’ll be okay, but you need some relief.
For relief you might want to slow down down with whatever your taking, do some hot lemon-water upon waking and before bed, and make food choices that encourage easy digestion and fast elimination.