Oh, I'm sorry to hear about all of it. Is your son an adult? As hard as it sounds to do, one option you have is to have absolutely no contact with him. Simply because you are the man's mom does not mean he has a free pass to abuse you and your daughter. People in active addiction will do and say anything to continue abusing their drug of choice. At this point, no contact may be a truly viable option.
It sounds as though he is not any where near done yet.....he is the only one who will be able to decide when he is done.
Huge hugs to you for all that you had to endure on that fun-filled ride home! I hope your day is better!!!
Hugs and prayers, HG