also -paul- what was the high dose of metronidazole you took?
i'm taking 750mg tinidazole each day, but feel, that that medication i'm tolerating fine. its the ivermectin and pyrantel combo, and esp ivermectin, that puts my system on higher alert.
also the words you describe about the breathing are exact same words I've described it as before. I know the need to "manually" take control of breathing. terrifying place, that no words from anyone who doesn't understand it being nuerological can bring comfort too.