I was there too, exactly where you are at. It let up a little on its own after about a year. You need to beleive two things...

1. This is the mercury causing this. (your case sounds exactly like mine, I wasn't like this before)

2. Mercury can be removed, and many of your body functions will return to normal if it is. (It is suppressing and altering your body processes while it is present, if you remove it, normal function will resume. Kind of like sitting on one of those big exercise balls. While you are sitting on it the ball will be supressed, out of shape. Once you get off of it the ball will return to its normal shape. You just need to find the right way to detox. I tried several ways, all of which made me worse. I got the Amalgam Illness book and have done the protocol and supplement suggestions and the improvement was immediate and continues to get better and better)

Make yourself believe those two things, and it will help you get motivated to find the right help to get better. It may be hard, not because both of those things aren't absolutely true (they are) but because the mercury makes it hard to find hope.