There could be a leaky gut problem that you may not know you have that needs to be addressed. Three months of IV's isn't enough time to say whether or not the chelatng has been fully effective. Like Eric said, you may have to give those IV's longer to do the job, but the cost for IV treatment can be overwhelming. Maybe your problem is more candida related than heavy metals. It's difficult to pin down any one thing. Candida overgrowth as you probably know can mimic mercury posioning and create similar symptoms, so maybe this could be the problem you face.