Of course you have my prayers. As a devout coward myself I detest dentistry (although my dentist is an OK Person!), so I understand your concern. Try to relax (says he) it will help to limit any discomfort both now and during the procedure.
May our Divine Lord who is the great Healer of us all pour out His grace upon you to help you deal with, and recover from, this ordeal. And may His Blessed Spirit give you comfort and fortitude.
Your brother in Xt,
With love and prayers,