Since you normally take Vit C are you taking it more often when you have a reaction? I can take 2 or 3 grams a dose, but when I have reactions I take 2 or 3 every 3 hours (or as I remember).
And of course I'm thinking you took more of it and more often the day(s) after your dental session for removal. Vitamin C is really great for recovery after Amalgam replacement. I actually went for a Vit C IV after each session and it really helped. I noticed your post in the Amalgam Forum but no one answered. I was told to do Vitamin C and glutathione, as well as the Charcoal. The glutathione is for liver support in detoxing. I also take glutathione now when I have a really bad reaction and it seems to help.