Hes said today hes sorry and that hes trying to control his anger, - WTF us stopping him? He needs to stop TRYING, start controlling it then. No excuses. Bet he only has a problem controlling his anger with YOU eh, not a 6'4" bloke 
and at the end of the day hes all I have got - what you have is a sad, sorry, sick little abuser. what you have is broken, damaged and totally toxic to live with. A creature that will pick on a PG woman. You do know that many abusers start abusing when their partners fall pg? It's very common.
I love him and Im nothing without him, - You are frightened to leave him. That is not love. You are scared to be without him, as he has taught you to be. That is not love either. You will be a billion times BETTER person without him. you will be free, be safe, be away from this mental agony, this fear, blame and isolation. Your child will be safe, secure and not be being abused.
Im to blame for this - No, love, you are not. We all feel ike this, but you need to know that this is HIS choice to treat you like this. HIS. Nothing you can do, say, think, feel or have ever done nor will ever do will change this. Quite literally YOU have nothing to do with his behaviour. It's all him.
Im sick of getting things wrong, - who is telling you that you are wrong? HIM?! he is doing that to control, manipulate and frighten you. He will tell you to do this a certain way, but when you do it that way, he'll have changed his mind and kick off that you should have done it another way.
I carnt do anything without him - You can't live like this. Your baby can't thrive like this.
Either he wakes up and stops, (never going to happen) or you need to go.
He has isolated you from everyone and everything you know. Of course you don't have anywhere to go, he's seen to that!
Call Woman's Aid, talk through with them the life you are leading and ask what kind of help they can provide when you are ready. Ask them (please) what you need to prepare. They deal with cases identical to yours day in and day out. There are so many of us that suffer as you have done.
Please do this, even if you are scared, even if you think you can't, you HAVE TO. Maybe not today, nor tomorrow, but love you really do need to get out. Your life may depend on it.
Read Lundy Bancroft. Have a look at this too! www.freedomprogramme.co.uk/docs/mrgoodbad-english.pdf