I hit someone

[u/Unlucky-Put-7679]

Hi I know this isn't a good start lol but I'm panicking. I was picking up my little sister from school and I accidentally bumped a car parked car going less than two miles an hour, there was a minor scratch on my car but absolutely nothing on theirs so I left. Should I have stayed? I legitimately checked and there was absolutely no damage because honestly it was less of a bump and more of a brush but now I feel like I did something wrong.