You may have heat/cold sensitivity. Try taking some Tylenol to see if it changes the pain. Or you could get another opinion from a different dentist. :)
@ raspberrigurli yes that's the case, that particular tooth is sensitive to heat/cold. Ok I'll try Tylenol
Aww that sucks. Well you should just call the dentist and tell them you're in a lot of pain. That should get you and appointment.