At the very least, I would replace the fillings. I have done that, but now, it's the crowns that I have. I'm still going ahead with an IV challenge test.

I agree with Gibby, and after you replace your fillings, make sure you either avoid cilantro and use a different chelator or take it systematically with chlorella. Haphazard use of cilantro can cause a lot of problems (as would improper use of any chelator).