J.H.
Hi M.! I know what you're going thru... I have 2 daughters who strongly dislike going to the dentist. While I'm certainly no "herbal freak", a friend referred me to a product called RESCUE REMEDY. About 30 minutes before the doctor visit you squeeze 1-2 drops under the child's tongue. I was very pessimistic about this, but it worked. It even calmed my hyper (and terrified) 2 year old down! Hope this helps!
~Jenn~