I can feel your pain when i read you. All i can tell you is pray, pray, and pray a lot to God ; 'cause he sees everything, he knows everything , he litsens to those who rely completely upon him and he answers the prayer of the faithfull. It is not easy i can tell you that but trust the lord Jesus pray for your husband too, he doesn't know the lord that's why he left you, that's why he drinks, forgive him for everything and don't think about hurting him, that's a no no. Like I said he does'nt know what's he is doing. Once you start forgiving him you will fill better. After that keep yourself busy by being a good mom to your kids , be there for them attend church frequently, give your life to Jesus and ....pray pray pray for your children, husband, strenght , perfect faith.
God bless you