Is he at work now?
If he is get any paperwork you need,your birth certificate and the childrens if you have them close by if not you can get other birth certificates.Take your driving licence,any cash you have in the house,bank details,statements,debt details,bill details,kids passports,anything you'll need that he'll try and make disapeer and stash it all somewhere he won't be able to find it,a friends place that won't let on.
As soon as you can get yourself to the bank and tell them you card has gone missing,sort out your money.Get the new card sent somewhere else,it can be sent to the bank for you to pick up if you want.
With the passport do the same get it sent somewhere else so he doesn't know about it.
Keep any and all abusive texts,voice mall,emails,notes anything abusive keep it where he can't find it!
This is your proof this is you way of keeping him away from you once you've left you must get an injunction against him!
Have a look on womens aid they show you how to keep yourself online hidden from him and they'll show you how to get away and be safe even if you don't want to go a womens refuge.
www.womensaid.org.uk/?gclid=CJb3y8bR7c0CFaoy0wods30KeA