end of my rope

He didn't come home from work till 3 am. (got off at 1130) he was at the bar. didn't get a text or call. he had to be up at 545 this morning for work. I haven't gotten more than 2 hours of sleep in the past 4 days, so I was up when he came home. I didn't get up, I didn't say anything. I got out of bed at 3 am and watched tv. I made his lunch for him, and woke him up at 545. he was out the door without a word by 600. at 6:02 I received a text from him saying he wants a divorce. that he's not happy. I asked him what happened to taking it one day at a time. he just said he's sorry he's just not happy. haven't heard a word since. he pulled a double today, if he is coming home he will be here at 1130. I have no idea what is going to happen. I asked him if he wanted to do a trial separation, he asked what I meant and I told him. that was the end of the conversation. I am so lost