Ohhh, ip, I am so sorry to hear about the little one. My S went through school with a couple of kids who have it. They do quite well, and would go to the nurse's office during the day for treatment or testing. It's complicated to learn all your family will need to know, but you will become an expert at it.
Give yourself time to be able to not think about your H and whether or not it was PA. It's a hard thing to get beyond. Is he showing any signs now of seeing or talking to ow? If not, and he is doing more around the house, with you and the kids, then be try to be happy with how positive that is. You and H may get stressed out with the issues with your D, so try to be kind to each other.
My S went through school with a couple of kids who have it. They do quite well, and would go to the nurse's office during the day for treatment or testing. It's complicated to learn all your family will need to know, but you will become an expert at it. 
