You don't have to describe the feeling, I know what you are talking about. I think it is the result of having many more toxins in circulation than your body can handle. I felt like I would surely die a couple of times also.

If I were you, I would not do any more chelation until you feel much better. You need to take something that will bind to the hg, but NOT mobilize any more hg. Algin (sodium Alginate) is good for this. You also should take magnesium. You need this for way too many things for me to list now, but believe me you will feel soooo much better and your mental state will be inproved as well.

Drink lots of water (10-12 8oz. glasses) to help flush out the toxins.

It will get better. Learn as much as you can so you won't do too much too fast. I was doing that at first and slower/safer is the better way. I feel MUCH better now.