sbboy, welcome!

I can't add much to the advice that is already in this thread but do wonder if the metallic taste might be unrelated to the tooth extraction site. If you're taking any medicine, you might want to check into each med's possible side effects. Some drugs can cause a metallic taste in the mouth.

Also, I've had quite a few tooth extractions, and some of them take a long long time to heal up to the point where the gums are no longer tender and an angry red. With the last tooth extraction I had, it took a year or so. I couldn't brush comfortable around that area during that time. The swelling, redness, and tenderness finally subsided though.