lizbet,

I had a similar symptom when I still had amalgam fillings where I felt that my heart was beating too fast and I could not catch my breath.

(my story)
http://herballure.com/mms

I would not take any mercury chelating substances (chlorella) while you have amalgams in, even if they are under and crown. Taking these types of substances with mercury in can mobilize additional mercury.

I would highly recommend that you start taking Algin daily to help prevent mobilized mercury from redistributing, plus Vitamin C with Bioflavonoids to protect yourself from mercury-induced oxidative damage and Vitamin E with selenium to protect your brain from the same.

Remember, don't chelate with any mercury still in, even if it's covered.

I would also check what the white fillings are made of. You can at least get a manufacturer and model from your dentist and then look up what they're made of. Post the manufacturer and model here and I'll be happy to look it up for you as well. This would be important to know so you know how to deal with the symptoms these white fillings may cause.

Please keep us posted.