If you have a safe place you can go to, you need to go. Leave your husband at home and under no conditions, tell him where you are going.
When you feel like you have recovered and things are ok, call him from either a cell phone or a pay phone that is in a neutral place so he cannot find you and try to hurt you.
You really need to get to a stress free or at least a lower stress place so that you can totally quit smoking. Right now you need to be concerned with your health first and foremost and a very close second is the baby's health.
Your husband needs to be aware that his actions can lead him to a very long stay in the gray-bar motel, if something happens to either you or the baby or both and the fellas in the gray-bar don't like men that hurt women and children.
Good luck,
-brian