Dr. Jerry-- thank you for your posting.

The fillings that were done in composite were done just above the tooth that has the spot underneath it.

The work was done (I looked at the ADA site) teeth 12, 13, and 14. The spot looks like (the teeth chart is a little hard to read) at 20 or 21.

It is very well possible that I had some silver fillings in the same area (at least I do on the other side of my mouth from childhood).

I will keep any ideas of fear out of my head this weekend. I will also check back.

Thank you to everyone being so helpful.