Everything happening in this moment is exactly what it is like to live with a heroin addict.
Detox didn’t end 2 weeks ago, the physical may have been getting better but then the mental starts and that is much worse…
What do you do? Stay in the limits of what you have control over.
Suicide threats and wanting to be dead have to be taken serious. There is no wavering and no assigning it as a game. It is a 911 call right away. All you can do in terms of him after is pray.
In terms of you, well you are going to have to decide if you are in or out. Either you are going to take the ride, accept that he is an addict and all that comes with it. Or you save yourself and separate from him and take care of you. I do hope you took some of the advice given to you in the other thread you had here and separated your finances and started protecting yourself from his addiction.
And you need to get that spare key in your possession, even more so if the car is in your name only.
Stay safe!