Thanks everyone. We've got to stay in another day as the midwife said she thought it was "ambitious" to go home already. He's since failed his hearing test in his left ear twice. It could be that it's full of meconium, who knows, they are going to do a different type of test in the morning.
I just want to be home in my own bed with freedom to eat and take medication as needed, but I know this is for the best, and with the hearing thing now it's probably good we were staying. I also need iron tablets, but my cannula is out at last so that's good.