dear helpless
i am so sorry.
you must do whatever it takes to disengage. indeed shooting up meth ups the ante. I have read that kicking IV meth is more difficult (but certainly doable). your son knows this. he did it anyway.
you risk causing yourself and your family greater hurt if you stay connected to him on his blow-by-blow descent.
i believe you must now focus on your own recovery, not his. and do whatever it takes. such as posting here every day. many times a day.
up until now, you come here when things flare up. this may feel like it works but it doesn't. and there are al anon. or counseling. all of these things if need be.
you cannot help your son. he must help himself. when he is ready.
clearly. the question here is if you are ready to do what you need to do that you don’t continue suffering like this. For you. Not him. He will and can do for himself—if he chooses. i am so sorry helpless.