You mentioned you still have 1 amalgam filling left under a crown. Make sure you're not taking any mercury chelators (ALA, cilantro, etc.) until you get this last amalgam out.

I have heard of people experiencing an initial improvement after they get some or most of their amalgams removed, but usually long-lasting improvement doesn't come until all the source of poisoning is gone. See Hal Huggins' book It's All In Your Head for more about this.

In the meantime, supporting your adrenal glands may definitely help. You might want to try a formula like Adrenal Support for a while, to give your body the extra nutrients that are often lacking in mercury toxic people.

Another point to consider is that the symptoms you described after eating "breakfast cereal (probably has sugar in it) with fruit (another sugar source) and a little sugar" sound like something called reactive hypoglycemia. You get an initial boost of sugar and then your body responds by dumping a bunch of insulin into your bloodstream, which in turn, sends your sugar levels crashing back down.

Try avoiding high sugar sources, and that means fruit too. Try to eat more vegetables, protein, and whole grains like spelt, quinoa, sprouted grains (like Ezekial bread/pasta), etc. Lean protein (like hormone-free turkey or chicken) or nut butters like almond butter (watch for added sugar!) are good.

With a little diet modification (nothing terribly drastic) and some herbal supplementation, you should be able to avoid these spells and get your adrenal glands back in better shape.

Of course, getting the source of the problem out (the last amalgam filling), is your best bet.

Hope this helps,