i get bad toothache as well mate unfortunately cos i didnt look after my teeth when i was younger but i agree 110% with Matt, go to dentist and get the coont taken out - the feeling is so much better than battling away all day with toothache

you can get a thing called Oralgel from Asda which is a numbing cream, its not really a long term fix but you rub it on your gum and it numbs it for a couple of hours.

Good luck!