Hi OP.
I have some questions to ask - don't answer them on here, but do think about the answers as that will help you work out what to do next.
We know that the point of leaving is the point of highest risk and you are in the process of leaving him, so you are currently at higher risk than you have been before. This requires planning so you know what you'll do in certain scenarios.
When did you text him it is over? Last night?
Was it last night that he came round?
Has he been back round today - so far?
Do you think he will come back tonight?
Does he have a key? (Assuming not but you never know.)
Does he know where you work and might he show up there?
Might he follow you and jump out?
Is he likely to stop at this, or do you think there will be more to come? You know him..
I am not convinced that this is it yet. I think he is going to use tactics to get at you - nicey nicey and then change to scary, being somewhere he knows you will be, getting others to play flying monkeys to convince you to speak to him.
I'm wondering if you would be best seeing a DV solicitor and getting a non-molestation order set up and served on him, whereby he is not allowed to contact you or he will be arrested.
If you don't want to do that, then -
Have your phone close at hand when you are out and about.
Get to safety if possible, if not ring 999 if he jumps out at you and is scary, and do not wait to be asked, give them your location immediately in case he dashes the phone.
Keep messages from him in case you need to show them as evidence.
But do not answer his calls, or any strange calls from his new mobiles.
Do not try to get him to understand, because that is you holding the door open to more abuse. Do not respond or write back at all. It is a game of tennis now, and you do not need to encourage him by hitting shots back that he can then respond to.
What you're looking to do is let days go by with no contact, enforced by you if necessary, whereby the temperature of things will go down.
You would be best to make a police report as well, in case you suddenly need to ring 999, your name and the info will be readily available to them. They might also visit him and warn him off, which if he stuck by it, would be really helpful.
Have a think about these things.
Then for your own head and mental state, find a way to talk all this through. I use a journal where I can write to my hearts content and get it all out. You have coped with a lot and been through a lot and it deserves to be talked about and thought through.
Keep us posted xxx