I am so sorry to hear about Sammy. I do not have any advice on the medical aspect of this but I can try and help where the bill is concerned. I just went through a bunch of medical bills when my baby broke his neck. I took him to the ER also and they had a pamphlet there for CARECREDIT.COM it helps with the bills. IT is like a credit card and it is intrest free for a year if you take that plan. It is great in a pinch like this. And it is so hard to worry about bills when your baby is sick. A lot of ER's offer this. You should ask your ER if they except it and if so you can go online to get an approval with in seconds. You put in the amount you might be needing. (I put in a thousand more than I needed)
This card can also be used for other things medically also. But the hospital bills for the baby is what you would be using it for. The whole process is very easy to go through on the website.
Good luck with everything. And I hope Sammy is feeling better when you see him later.
Val