What happens next?

How to soothe red and inflamed gums
Eat cold foods.
Ice, or ice cold foods such as popsicles, will numb the area that is inflamed. If you just need some temporary relief, and you can't get to a dentist right away, use ice to numb the area.
Apply a numbing agent to the area. A topical benzocaine ointment, such as those used on babies when they are teething, could help ease the pain temporarily.