I know where you are coming from...i have been there...ways to stop could include: making art work, writing, journaling, screaming...punching a pillow, drawing on your arm with red marker, snapping a rubber band, squeezing a frozen orange,etc.
Well if you ever need someone to talk to or to just listen feel free to pm or watever.
What determines a person's strength is not how many times they fall.. It's how they rise after falling." -Maid in Manhattan