"I am not mentally stable enough to start it yet."

Perhaps you might not become mentally stable until after you have your amalgams replaced and do plenty of chelation. Many here have or had plenty of cognitive problems.

Blood testing for mercury as well as hair testing are almost worthless. If someone has an industrial accident, then their blood may show high levels of mercury soon after. The body removes the mercury from the blood and stores it in the brain, liver, kidneys, and nervous system. When one has long term exposure to lower levels of mercury such as with amalgams, it is doubtful they would show high blood levels of mercury. In fact those who show symptoms of mercury toxicity, have many amalgams, and have very low blood mercury levels may be the sickest, as it shows the body is doing a poor job of excreting mercury.

Bismuth toxicity is linked with dementia.

http://www.memoryrevitalizer.com/Articals/article5.html