Hope it passes soon. I don't really know any good advice about this except wait it out like you're doing. Both my older kids have cut/SI. I remember how shocked they seemed at me being so shocked when I found out. I walked in the bathroom on my daughter doing it and fell on the ground hugging her begging her not to hurt herself and she said mama it's ok, it's not very deep, you don't need to panic, I'm not trying to sui. So I did some reading and found advice like to draw on yourself with a felt pen, instead of SI? I don't know if that's just silly advice or something that could really help. But hang in there and keep posting us!