Breathe. Say some prayers. Whatever it takes to help you relax, regardless of what he chooses to do.
Take care of your own health, so you can stay strong through this ordeal.
And try to stop worrying so much about him and the unknown future. There is no "plan" we can make when we are dealing with active alcoholics, except plans made for us and us alone.
Sending positive thoughts and prayers your way today,
~T