Do not. Focus. Nothing is worth that. Trust me. There are many things that could make you want to cut but none of them is worth it.
Distract yourself. Sing, dance, draw, paint your nails,...
Do this; take a pencil or anything you have and draw a butterfly on your wrist, one butterfly for each scar and write a name of your beloved one next to it.
Or draw the cut on your wrist.
Everything is better than cutting. I'm here for you.