Sorry, the correct site for the hair analysis is:
http://www.traceelements.com/
You cannot go directly to them for analysis, but you can call them up and ask for a doctor/chiropractor in your area who has an active account with them, then go to that doctor and request the analysis (it costs about $70-$100, depending on the doctor).
Have fun!
If you think it's mercury, you can do a hair mineral analysis (www.tracelements.com), it will show you the level of your TISSUE mercury, also in relationship to the other minerals.
From that point you have several options, chelation is not the only way to remove mercury, there are safer approaches (cilantro for mobilization, chlorella for binding the mercury in the gut and excreting it, etc.). I have used near infrared sauna myself when I was convinced that I had mercury poisoning, and it did work quite successfully (after a few months the mercury in the hair was gone, although most of my symptoms were still there, there probably was something else going on). You can build a cheap infrared sauna yourself (for less than about $200), see some additional info here: http://www.drlwilson.com/articles/sauna_therapy.htm.
(There's also a book by Dr. Wilson, "Sauna Therapy"). Be careful with saunas, though, you have to drink plenty of fluids, and supplement the minerals lost through perspiration.
Good luck!
Yup. The tests for mercury are crummy. And I think your fish-eating days should be over.
Your concerns are well-justified. And your symptoms are typical of the victims of mercury toxicity according to the literature.
There is a protocol called "chelation" (with several options) you are apparently aware of that allegedly removes mercury.
There is another school of though that says the damage may be irreversible and it may be impossible to remove mercury that has deposited itself throughout the tissues.
I don't know the answer.
I would suggest you direct your question to the specialists who dealt with the wide-scale mercury poisoning problems several years ago in Japan.