If your H hasn't contacted you again bout his son then don't bother texting him again.
Right now you, mb28, and piano I think all three of you need to cut these men out and keep away from them and get a 24 hour 7 day a week support person you can call.. its only five ten mins and you can even have a back up.
You KNEW you were taking your son to the hospital. If you KNOW you are going into a stressful situation.. PREPARE your support person so they expect a call might come in.
Your H is NOT giong to be supportive, he's goign to hurt you over it eventually.
Next time don't take your son into the hospital on your own.. get a buddy system set up and don't try donig this all on your own right now.
