Will hurting myself invalidate my fast?

As the title says. I've been wondering if it would break my fast since i know it's haram. I know i shouldn't be doing it anyway and ramadan had been a good opportunity to stop but it's not that easy as it's one of my very few coping mechanisms and it's the only way that could calm me down so far. I thought i could at least avoid that in fasting hours but i'd still like to know if it would break my fast.

My apologies to anybody who hates this kind of topic/question. This is the only place where i thought i could ask.