ok, first off the nail/apple thing? please dont do it. nails are made of iron, but also have other trace elements some of which are toxic so it could be bad.
if i were you i would consult with a naturopathic doctor who is experienced in balancing mineral levels. who did your hair analysis? can they help out with that? it can be a tricky and somewhat complicated endeavor.
in the meantime definitely look into IP6 which is a very mild heavy metal detoxing agent. here is more info.
as for the lead, the agent of choice is DMSA, which is very effective at binding lead and ushering it out of your body. it also helps for cadmium. its a bit expensive but its worth it. dr. andy cutler has a dmsa chelation protocol that is very effective for both mercury and lead. you might want to look into that, it utilizes both DMSA and ALA (alpha lipoic acid).
here is a great article on how to detox each heavy metal element.
what humifulvate product did you get? i think the best mineral supplement in the world is wheatgrass juice from soil grown grass, not the stuff grown in trays. but most cant make that happen.