vitamin C increasing anxiety / distress?

Has anyone experienced this? If i take 1000mg sustained release a couple times a day, so about 2-3g of Vit C a day I get much much worse symptoms. Anxiety, almost allergic reactions like it's stirring up something my body isn't able to handle.

Is this a sign of something like heavy metal toxicity?

Also, when I go into die off I'll get the cold/flu symptoms which I actually don't mind at all. Runny nose, mucus, etc. But after a day or so if I continue I just get totally dried out to where even breathing becomes affected. How do I keep replenishing whatever is causing me to dry out like this? It's horrible and lasts for days/a week. I don't drink milk but was thinking of giving it a shot to see if it helps. Tweet