I am so sorry you have to deal with yet another added pain situation.......but DON'T CANCEL your SSD appointment!! Maybe schedule the Dental appointment for after!!
Pete don't miss your SSD appt. Change the dentist one. I would advise you to try a little ground up Clove put it in a little piece of papertowel and put it back there on or near you tooth. It will numb it up for you just a bit until you get done at the SSD office and can get to the dentist.