"no the 24 hr urine test after DMSA and EDTA showed high lead. but i have tried the home test too"

A urine test during or soon after chelation will just show whether you are excreting the heavy metals, and not give a clue as to how much might be in your body. Showing that you are excreting lead is a good thing and not a bad thing. Long term lead exposure stores lead in the bones. It takes a long time for bone to turn over, so getting lead out of the bones is a very long process.