I have a knot on my gum where my tooth was pulled 6-7 weeks ago & it hurts plus now it is swelling. The nurse told me that the dentist here leaves a piece of tooth in when he pulls a jaw tooth. Have you ever heard of anything like that?

Couchcarrot

I have been going to dentists for AGES. The teeth I have lost were jaw
teeth, and NEVER did a dentist intentionally leave a piece of tooth in.

I strongly suggest that you seek treatment from another dentist, as
you may have developed an abscess which could potentially enter the
bloodstream and/or affect the brain. Not trying to alarm you, but
better safe than sorry. Ask friends or family to suggest a dentist whom
they have been satistifed with. Don't just sit and suffer and hope it will
get better on its own.