I had some acne on my face so i used toothpaste on them and kept them for one night the next morning i woke up?

i had this red mark in my face....After 3 days i realized that there was little amount of toothpaste in my face even when i washed my face so i rubbed it off I am not sure if i rubbed all off....now I have uneven skin tone will it stay like that forever????will i catch any harmful skin disease like skin cancer???plz give appropriate answer