Hi, Julia! I see you've already been to the SI forum, but, if I understand correctly, that forum is full of dangerous triggers for you. I have confidence in the moderators here; just start talking and they'll move the thread if it becomes necessary. Your friends here will follow.
As a person of intropunitive tendencies, I have some discomfort in approaching this topic. Sure, all these are dysfunctional ways of dealing with powerful pent-up emotions. Ideally, it would be better to identify and resolve the underlying pressures so the volcano doesn't erupt in the first place. Ideally.

Less ideally, but perhaps more realistically, do you have something you could break over and over again, something designed to be broken and easily reassembled? What about an absorbing adventure game with lots of crashing and fighting monsters? I don't know; I'm grasping at straws. The idea is finding ways (plural) to release those emotions harmlessly.

I've got my thinking cap on for you, and if you want to send me a stinging PM, I'll receive it with a smile, knowing you didn't do something else.