I am not an attorney. However, I had a friend who was in the same situation as you are now.
Please do not leave your children. The way I understand the law, if you do, it will be very hard for you to get custody. I suggest that you find somewhere to go and TAKE the kids with you. Call social aervice and ask about the home for battered women. Then go take a restraining order out on him. But do this without he knowing any of your decisions. DON’T even tell your children. My friend prepared to leave her controling husband for several months before she left. My friend rented a storage place for her personals and moved them as she got a chance. Cover up, so as your husband want know.
Somehow, someway, get away from him. Do not let him threaten you. You didn’t say how old your kids are. If they are in daycare or school, he could proable just go pick them up. You really need an attorney to file for temporary custody of the children. But this is costly.
Do call and get telephone numbers for the batter womens shelter in your area and talk with someone there. Hopefully they can advise you.
Be sure your husband can’t look at the telephone and get the numbers you call. The mane thing here is silence and cover up every step. No one should have to live under these conditions. If your husband goes on the computor and you are afraid he will see this post you can delete it.
God Bless and Good Luck!