That really sucks. When I was admitted after coming down with a uterine infection, they let me keep Felix with me for three nights in the hospital (although I think in the e/r itself I would have needed another adult like you describe). They booked me into postpartum for treatment. I did have to sign waivers to the effect that my baby was not a patient. If you end up having to go back (I hope not and hope you feel better), ask if they can do that for you.
, mom to my girl J (8/02), boy O (3/06), identical twin boys T and D (2/10), and newbie boy F (6/12).