G, my friend, I am so very sorry. Right now you need to take care of yourself. You need to eat, rest and be still.
Honey, it doesnt really matter right now why. Why he did this, what the ow is like. What matters is you and your children.
You need to go see a lawyer as soon as possible. YOu have to protect yourself. You need to go to a doctor. This is a huge thing to find out and you may need help getting through it.
Your h couldnt come to you because he is trying to block everything out. If he told you, it is more real.
G, you need to let him go now, really and truly. Dont make any hasty decisions. Take some time to think things through.
This is not your responsibility, it is his. Let it be.
Dont look for answers right now. And most importantly, do not blame yourself. You have done nothing wrong. And you are not stupid for fighting for your marriage and trusting the man you thought your h was. If you are, then we all are.
Please take care of yourself. I am on FB, if you need to talk.
You and your children are in my prayers. Be good to yourself, G