If you do not currently have a dentist, and you are experiencing extreme pain that is keeping you awake at night, have swelling or excessive bleeding. Call NHS 111 and they will get you an appointment with an emergency dentist. 

To find an NHS dentist in your area, that is taking on NHS patients, go to https://www.nhs.uk/service-search/find-a-dentist or you can call the NHS Find a Dentist Service 0300 311 2233.