Thank you for the replies.

I have been back to the dental hospital where I had the extraction this morning. They gave me 100mg of Tramadol and said that if it worked I should call my gp for a prescription. They are also going to see me again next week to see how things are going. Unfortunately, although the Tramadol did help me relax quite a bit it didn't do much for the pain. I have rang my gp and explained all this and he has prescribed me Lyrica which is apparently specifically for nerve pain. I have just taken one now so fingers crossed it does something because I am really at my wits end now!!