"Detoxing" with Cilantro and Chlorella is experimental. Some people have had bad experiences with them. They may or may not work as a chelator.
"I had anxiety, insomnia and nighmares. is this normal. i have also had headaches."
These effects are not considered normal with other chelators, such as Edta,Dmsa,Dmps, or ALA so I would not consider them a good sign. They sound like the effects of poisoning not a cure. Maybe you should stop now. But if you do continue your experiment keep us posted of the results.