Welcome, TT, to SR! I am sorry you needed to find us, but this is a great place for support. I hope you will come back again to read, and learn, and know that you are not alone.
My adult stepson is the reason that I found this place. He is an alcoholic and has used crack. We were informed late last year that he has added heroin to the mix now.
I can't imagine that heartbreak when dealing with a 15 year old! There are others who have had minor children who are/were addicted and hopefully they will be along soon to share. Most addicts quit only when *they* decide that they have had enough.
I wish I had some brilliant words of wisdom to share. I am sending you many hugs and prayers for you and your son!