I'm sorry ((hugs)) how long does the urge last? I find a lot of times when I get stressed the urge is very intense and I tell myself that when I get home or to my car then I will give in. Generally by the time either of those happen the urge to self injure has passed well enough that I can go forward. Although I do bite my knuckles pretty hard at work :-/ I don't know if holding off for a while would help you not give in but please don't be too hard on yourself