Hurt/Upset Sam *FOUND*
I believe the fanfiction I'm looking for involved a witch blowing black dust in Sam's face which results in Sam only being able to listen to what John tells him. I believe he almost gets hit by a car when crossing the street because of a command John gives him. I think they take him to Bobby's later and while they're talking the witch makes Sam cut his wrists? I also believe they throw out Sam's acceptance letter to Standford and once out of the control of the witch Sam finds out.