Katson i get this too. It's almost like a paralysis and i fear when i walk im going to look like Frankensteins monster(seriously!). It comes and goes in waves and when i get it its when my body is doing a chelation push(i suddenly get tense) then when it relaxes its ok.

Im taking DMSA right now and when im off it im far worse with these symptoms so i stay on it as long as i can. Are you supporting your adrenals Katson? I feel less tense when im addressing these(well it helps with the DMSA).

If its any consolation i think its mercury wanting to be released, trying to push itself out.