I have cut/hurt myself a few times in the past, and while it does appear to provide relief, it's actually not really helpful in any way and is incredibly temporary. It isn't a choice to be made in the hope that it will help you, it's an irrational and subconscious response to intense mental pain. It won't fix your mental state or any of your problems, it's just a way to punish yourself or to destroy something.
If I were you I'd go for a really fast run until you are exhausted, or beat or scream into a pillow instead, as that will give you a similar feeling of adrenaline. Cutting won't help