In this specific instance I am going to go against what are the normal 'rules' of the last resort technique and going dark. Let's be perfectly clear here, the time you are going to be in treatment, and the possible time in jail are going to be tough. No easy way to say it.
For this reason alone, I would suggest that we have to look out more for your physical and mental well being than the relationship with your hubby right now. I would make those calls to him regardless of whether you tell him now or not. (I probably would tell him though) He doesn't strike me as an ogre.
I still believe there is compassion on his part, and a desire to see you succeed. Just like all of us out here who have come to know you and your sitch.
Unfortunately, recently you've made it more difficult for him to love you. You are taking bold steps to get back to being the woman he fell in love with at the beginning. He will see and respect those efforts.
I think that you may have more trouble allowing yourself to be loved, than he giving it to you. Only you know the answer to that one.