Please don't make me send you a chastity belt! Leaving aside that a child adds more work and stress to even the most solid of relationships do you reallyw ant one more person in the equation? To you want you child to see it's mother floored, depressed, brow beaten? Catch yourself on love, a child ain't going to help and doesn't deserve to be born in to this sort of relationship. Plus the kid will just become something else to control you with eventually.
So what if he says about the lies you told a decade ago?! He's justifying his behavioud to you now and you're letting him do it. As you say, you've done wrong, so has he, how long you both going to punish yourselves? another ten years? Ye Gods woman, prisoners get out of jail in less time.
Relate can help you as a couple or individually but I suspect that loyalty will the least they'll question you/both of you on. More likely vicious circles.
CAB could help you make practical arrangements if you do want to leave him. You have to decide this for yourself, no one can tell you what ot do on this matter. I can give you my opinion which is based on some experience but it has to be you that comes to a conclusion about the way forwards.
Either way you go, you need to make sure that the next ten years are happy and full of love. Not abuse, violence, distrust and fear. That's no kind of life for a young woman. So that's your goal, a happy future, you just need to decide how that's best achieved.