Did your H ever express any remorse for what he'd done the first time around?
Has your H always acted this way in times of extreme stress?
I believe from what I've read that MLC can be interrupted. It's a possibility that's what may have happened the first time around. From what I understand, MLC will not be denied and if interrupted it will be entered into at some point with a vengeance. (Vets, please chime in if I'm mistaken.) Add to that your H's PTSD and you've got a doozy on your hands.
Have you seen confusion at all from your H since this started this time around? I believe you said it took you completely by surprise when he left you. Was there any evidence that he had planned it when you think back in hindsight?
Was your H self medicating with drink before he tried the drugs that were prescribed, or did that come afterward?
Punkin, I hope you don't mind me asking you these questions. If you do just tell me to STFU.