Firstly, don't panic. You're not as trapped as you think you are. Trust me.
Now is not the time to do your thinking. When you wake up tomorrow you can start to think. For now, rest as best you can.
What you do need to do is inform yourself.
Find out what help you can get from your friends and any family. Speak to a solicitor to find out where your legal position is. If you don't have a solicitor or can't afford one speak to cab.
You have a property, and is rented out, you can give your tenants notice and move into that house.
You have options.
Please my love, try to do me a favour? Please stop saying how useless you are, how gutless you are, you are none of these things.
You're telling yourself what he has been telling you for a very long time. Things he has convinced you that you are. He is completely wrong. Your friends probably know more than you think they do and if they are your true friends they will support you, if they do not support you they are not your friends. He will not need them on the next part of your journey they need to be moved to side to make space for those he will help you. You do have to be as rigourous as this. Your future and your children's future happiness relies heavily on this.
Stay calm. It will be okay. You are not alone. There are many many many women who have been where you are now and Have come out the other side and are a million times happier than they could ever have possibly imagined. Your children will blossom within hours within a couple of days of being out of this poisonous environment trust me I've seen it with my own eyes . My own son aged five.
Rest. Sleep, think tomorrow. Plan.