I think a lot of people with heavy metal problems have felt the same way you felt before: worried, frustrated and depressed about their unknown health problem. I know I sure did, especially after so many doctors could do nothing to really help me. There are really few things worse than feeling bad and not knowing why.
It wasn't until I started doing my own research and my own treatment that I really began to feel better.
FWIW, I think you're on the right track now. Get the mercury out of your system and see how you feel. Inshallah, that will take care of your troubles.