I could really resonate with your post (and now know there's a bigger reason I'm awake feeling rubbish at this time of night, lol)
Youre in shock right now, its a very normal way to feel, something dramatic and big has happened, and you've taken steps that feel extreme.
The fact your DH is gone, and there's been an abrupt end is also a difficult one, your mind is racing trying to make sense of something that is quite jumbled - as is the nature of heated arguments.
I honestly want you to know you did the right thing, my DP has never hit me either, but he did have form for slamming doors, getting too close, becoming threatening, following me around if I tried to create distance, if i left the house, he would come after me, more than once he shut me in a room, or blocked an exit path - it really did get too much - the last time I called the police, I called them before it had even got as far as "leave me alone, give me space..."
"No...." following...
"999, police please"
And the police reassured me to call each and everytime I felt under and kind of threat. As I said, in the end it was the best thing I did. It doesn't make any of it right, less scary and I understand you feel so stupid, but you are not, and it is not.
In the end my DP knew that he could not behave in that way, and now he does not behave in that manner, i am safe. The boundaries in our relationship are clear, and we have been without incident for over a year.
I might get flamed for every staying with a man like this, but there's 'plenty of good stuff' too. If i wrote even a quarter of the stuff that DP and I had been through then i would get LTB over and over, but sometimes things aren't always straight forward.
Please try and get some rest op, best thing for it, and when DH comes back, please stand by what happened, so he is clear that his behaviour was enough for you to feel threatened, even if you cant make sense of what happened or the time scale of the escalation, please dont minimise it, because you want the outcome of ringing the police to be: your behaviour was unacceptable, during an argument. Here's how we deal with it better, i will not hesitate to call the police if I feel the need again. Put it behind us and move forward, but never treat me this way again.
Please dont apologise to him when he comes back. Make it clear that it shouldn't escalate to that scale, even if secretly, you can't make sense of what happened yourself - if hes any kind of man, hopefully he will respect what happened and you won't face those dramas again in the future
I'm thinking of you op, get some rest. Xx