A.
Hello
there are several considerations here .
firstly could you consider another dentist ? If its NHs then a dentist has limited time and some find it difficult to deal with anxious patients .
Dealing with the panic attacks which are actually probably more unpleasant than the dental treatment is essential , Its fear of fear .
try some relaxation exercises to control the breathing so that you breathe from your diaphragm rather than shallow fast overbreathing .
The website for AnxietyUK has lots of tips for this .
Cancelling the appointment will only mean deferring solving the problem until the tooth has to come out .
Hope this helps
Jenny