It would be difficult for you to do a self diagnosis at this point of time.
So kindly visit a dentist as early as possible.
Next Steps
You can take Tablet.Aceclofenac with paracetamol combination, 30 minutes after having food.
Gargle with warm water and salt 5 times a day for 7 days.
Health Tips
Do not lie down flat it will aggrevate the pain
.
Sitting posture will minimise the pain.Vist the dentist soon...