Klmno, I can understand you wanting to protect your son, but when you are dead who is going to protect him? Call his school and most have a mental health professional who can refer you to help. Another option is to have him "Baker" Acted. Different states have different names for it but basically it comes down to you feeling he is a danger to himself or others. He will be placed in psychiatric observation for 72 hours and you can go from there to try and get him the help he needs.
This is a serious problem and I feel you may be inadvertantly teaching him that is okay to harm you by your inaction.
My prayers are with you.
