mercury exposure and pregnancy, yikes!

[Guest guest]

My husband and I have been trying to conceive. Last week an amalgam

filling fell out. It was huge. I thought, great, one less mercury

filling to worry about. I went to the dentist today, told him I might

be pregnant and I did not want an amalgam filling. So far so good.

Well the dentist filled my tooth with a non-mercury filling and then

told me half the old filling was still in my tooth and that he

drilled it out (no mouth dam was used). Now I'm in a panic and have 2

questions.

1. What should I do if I am pregnant (I'm really hoping I'm not);

what kind of harm would this cause a fetus?

2. If I'm not, how long should I wait to try to conceive?

Please, any info appreciated.