To the OP: First, congrats on staying dry. This shows you have great willpower. I don't know what you mean by the traumatic experience that you describe, but might it be just that you reached a deep state of concentration where you began to see the truth of anatta, that our idea of self is false? I can imagine (and that's all I can do as my meditation has not reached anywhere near that point) this could be very traumatic for a 16 year-old, especially in our western self-idolizing culture (I'm Australian). I remember a former monk, after giving a dhamma talk, beinga sked about why he disrobed and he said the main reason was that he reached a point like this in his meditation practice, he termed it as 'feeling myself fading away' and he was unnerved by this. And this was a guy training under the personal tutelage of a great meditation teacher, so a self-taught teenager can be forgiven for freaking out.
I think the advice you've been given to focus on other aspects of the path like morality and generosity are excellent, and would like to add my encouragement to that you've received from the people here. Metta to you, friend