Sweetie, no matter how you prepare for it, when you are served, it hurts.
It is like you were holding your breath and then someone punched you in the stomach.
Cry for a bit, go in the car and scream, punch a pillow and say a prayer. Whatever you need to do to get to a place of calm.
And do not beat yourself up for calling your h.
Now you know it is not a good idea. He is not hearing you. All he hears is someone getting in the way of this big life he thinks he is going to have.
He is not the man you knew. He is in crisis. He is confused and hurting and in his eyes, the person closest to him must be the reason.
So, you need to think of you right now. And you need to do it without involving him.
Call some attorneys and explain the situation. See if you can put a retainer on a credit card or see if you can borrow from a family member. Think real hard about how to get that money.
Now that he has filed, you are not responsible for any debt he incurs from now on. (check with attorney to be sure).
You need to dig in now. Find your center. The focus has to be on you and your kids. You cannot look to him to help in any way.