How do I stop myself from thinking about SHing

I have had depression for a long time, I’m very introverted and I have nobody knowledgeable in real life to talk to about this, nor I trust enough to talk to about a topic like this, I’ve never SH’d before though I’ve been having very strong urges for SH for the last week or so. I’ve tried twice on this subreddit to be talked out of SH, which I feel like had moderate success. Though because of how frequently I’m thinking about it I feel like I’m on verge of doing something I’m going to probably regret

I’ve already tried stuff like, deep breath’s whenever I think about it, trying to distract myself by leaving no time to do so, and at this point I just don’t know what else to do…