Since you haven't had amalgams, maybe you are like me and just have certain genetics which causes any exposure to mercury to accumulate (I never had amalgams either). For your mood, try avoiding MSG, try it for a week. I am normally a cheery person but MSG always puts me in a dark mood and makes mercury symptoms worse. MSG is in canned soups, gravy, frozen meals, fast food.... look for monosodium glutamate, "autolyzed yeast extract" or "modified food starch" in the ingredients.

As for the clay baths, I have tried them. I felt they were amazingly effective to stir up mercury, but I can't tell if they helped get the mercury out of the body or detox through the skin. Maybe a genetic bottleneck for me. I always took them with DMPS chelation, to help clean things up.