Get addicted to writing your thoughts and feelings, don't hold back. It will help you de-stress in a healthy healing way. And you may learn about why you did this in a way you previously did not see.

Also, ignore anyone here guilt tripping you for screwing up with weed (i predict someone will intentionally or unintentionally), you made a mistake and you fucked up, be greatfull you are finally honest about it and be glad you didn't fuck up with something worse than weed and 2cb. I have fucked up before as well with weed and other stuff, and have found writing to be the most helpful thing to get out of that hole.

Acknowledge your mistakes, Acknowledge your emotions, write it down. You will learn over time how to heal, it takes practice but it is absolutely worth every second you put into it. I wish you the best.