You need to see a dentist for this as soon as possible.
I am afraid Just Answer cannot provide an emergency dentist appointment.
You need an emergency dentist appointment for this.
This is something for which you should call 111. Ask for the dentist.
The dentist online will ask a few questions and give you a referral to the nearest Dental hospital or any other hospital with a dentist on call.
It is only in this way that you will be able to get an emergency dentist appointment.
You can also go to the nearest Urgent Care centre:
https://www.nhs.uk/service-search/other-services/Urgent-Care/LocationSearch/1824
Meanwhile try these steps till you get to the dentist:
Take Tab. Motrin/Advil 400 mg twice daily for the pain, available over the counter
It is important to avoid biting the tissue. Take soft foods which require minimum of chewing
Do not touch the area, it will only cause more inflammation.
Rinse your mouth with warm saline water three-four times daily, this is very important to control inflammation. Water should be warm, not hot, and not too salty.
Apply Chlorhexidine ointment to the area after the rinse, many brands are available
These steps will help till you get to the dentist.