Saliva test is indeed more accurate - with 4 samples drawn through the day.
I'm a little bit concerned that people/or some practitioners are reading these reports incorrectly. There was another poster recently who ruled out heavy metals due to the low readings.
Readings this low indicate something called retention toxicity. These are in fact worse than readings that are off the chart because you are not eliminating them at all.
So you most definitely have multiple heavy metal problems, and you are barely eliminating aluminum.
Whether or not this is a primary concern for you is a different story.
A trip to the Mayo clinic or any other clinic that will proficiently run standard tests can only be a good thing as it is another data point with which to draw future decisions upon. I wouldn't however try to draw them into the world of alternative medicine, just let them do what they do and see what happens.
I recommend to you that you keep digging into the diagnostic route to try to pinpoint the source of your problems.
In the meantime to you and to all the other people who are not getting any relief I would look into ozone therapy via sauna - not injection. Ozone is a shotgun therapy that will work on a variety of problems such as lyme disease, heavy metals, chemical poisonings etcs.