Vodka can certainly take the edge off when you're feeling distressed. The taste kind of grosses me out a bit though. Mainly I like a good whisky, or gin and tonic. Hope you feel better.
Oh, I have an alternative suggestion for self-harm, for your consideration, and it's related to my user name.
A half ounce of super hot Carolina Reaper powder.
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Just a pinch (seriously, that's all) on your tongue should do it. It won't physically damage you, but you'll be impressed by the level of pain you can feel. And it will last a while. You'll definitely feel a lot more pain than hitting yourself with something, and no worries about bleeding. Just intense pain. It eventually goes away. I hope that might be a good substitute for physically damaging yourself.