I suggest you take any heavy metal test with a truckload of salt since they are of questionable reliability. The feeling you had while doing the test is certainly suggestive of heavy metals.
I believe that you wrote once that you have had silver fillings. Is that true? That, and your symptoms, would suggest a mercury problem. I would recommend that you strongly consider chelating.
Keep in mind that chelating is a long, slow process. Expect it to be months before you feel real improvement while doing it.