essbee, if he's not improving and you're not happy with the advice you were given, I'd be tempted to go back. I know what a swine that is with a sick child in the middle of the night though. I had to rush ds1 to the RD&E in a taxi in the middle of the night a few weeks ago with a raging temp and a burst eardrum bleeding all over the place, and the doctor we saw said just to "give him Calpol" and that there was no point giving him antibiotics or doing anything for him. He got steadily worse until I took him to our GP two days later, who swore and said he should have been given strong antibiotics earlier.
I hope your little boy is better soon, I kow how grim it is being up worrying about a sick child and not knowing what to do for the best