searching peace, I know you didn't want this, this is what you feared. Sometimes you need to face that fear. The unknown may actually be better then what you know.
I know the children aren't his.
I don't know the legalities of this.
I have to agree with everyone above though about talking to DV. You might qualify for a pro bono attorney.
I think that you should call DV, find out everything you would need to do, schedule all the appts for one day, talk to your boss, let them know somewhat what is going on, take a day off and find out your options.
If you can give us more specifics, we may be able to help more, like what state do you live in, how long were you married?
I completely understand if you can't.
I'm pretty sure your AH cannot take you off his health coverage, I don't know about step children, but I think with the children you might qualify for medicaid for them.
Just please keep talking to us, we want the best for you and your children.
I just want to tell you that pro bono lawyers are really good. The one that did this for my county where I lived was the prosecuting attorney.
(((((((hugs)))))))