As someone who was told flat out by a smug lawyer that I 'couldn't afford' to get divorced and managed to do it anyway, I have to say first that you need to do what is REALLY going to be best for you and your daughter in the long term. If you have searched your heart and your marriage and tried to work on it, gone to counseling, etc. and you do not feel that your husband is a full partner in this, then that may be your best option! Don't ever believe that you can't- I didn't think I could either, but I managed to and it was the best decision I ever made for myself and my son. But each person has to decide that for themselves.
Sorry I can't be more supportive, but your husband sounds like a selfish jerk and very mentally abusive. You are not chattel- he has no right to assert that you will have another child just so he can have a boy- what is this, the Middle Ages??
As for your fear of pregnancy- get an IUD. It stays in for years and he will never know it is there and you don't have to have pills, etc. or anything to keep track of other than regular checkups.
But honestly, M.- this guy sounds like bad news. What kind of daddy is he going to be to your little girl as she gets older? Think hard about your daughter and her future as well as your own. There are lots of resources for you to get help if you need it. Don't allow your husband to bully and intimidate you into thinking you can't manage without him. Talk to your family or church and to a counselor.
As far as people here who are saying 'marriage is a commitment for life' etc- your husband made a commitment too, to love, honor and cherish you. He is NOT doing that.
Do not let other people press their own religious values on you- if anything, you are responsible to yourself, your little girl and God- not what a bunch of people think you 'should' be or do. It does not sound like your husband wants to change or is going to in the future. Bringing up a child in an abusive home just to keep the marriage together is a terrible burden to place on that child. Don't allow other people to 'guilt' you into it, as if they somehow know the will of God better than you do, or have some kind of personal pipeline to God that you do not!! God loves and forgives- marriage is not created so that one person can make another suffer. It's just sick to say otherwise.
Good luck to you and your daughter- take care and God Bless!!