Hello
Firstly donot panic
Wounds in the mouth heal fast due to the blood supply.
I understand it's painful and irritates whenever touched by tongue.
It will subside within 3-5 days.
You can apply few ice cubes over it.
You can use dologel or hexigel for pain relief
Next Steps
visit a dentist if it doesn't subside in 5 days
Health Tips
Luke warm salt water gaurgle 4-5 times
ice pack over the wound
avoid spicy food and hot drinks.