You make sense, but you have to get a hold of the fear. The reason you don't have it during the day is because you know where he is at. At night you are scared because if he doesn't come home you don't have a clue. All you can do is assume. Another tactic of satans. So therefore, the fear starts to take over and you start assuming all kinds of things. Maybe some are true and some are not. The only one who knows is the Lord.
The most important thing you need to work on now is your relationship with the Lord. Continue giving your husband the space that he needs and the Lord will lead you in what to do. Right now silence and patience are probably the best thing that you can give him because you are causing him to think. HB told me that MLCer's hate to think because it hurts their head.
They need to think in order to make it through this. He is waiting for you to save him and you can not be the one to save him. You are starting to understand more because you are remembering when you were a teenager.
I know what a hard time this is for you. I have been there myself and know what it feels like to not know and I'm still there. I know what the Lord has told me and shown me, but the circumstances do not go along with it.
Be strong because you are getting what I'm telling you. This is still a part of your spiritual journey. You just tapped into it. There is still so much more for you to learn and so much more for you to grow. This is going to help your marriage as well and all your other relationships.