oh I know they are so pitfiful when they are sick! The main thing to do is watch out for dehydration as you said. If he goes like four hours with no wet diaper, is listless or you cannot rouse him at all, goes four hours or so with taking in no liquid, if you pinch his skin and it takes 2 sec or more to retract then you need to get him to the ER, this is what my pedi said when my son had this recently. You may want to try pedialyte and see if he will take it. My mother in law suggested partially freezing it and then crunching it up and making it like a slushy and giving small spoonfuls and my son really liked that. If you want to try some gatorade, that is good but just make sure you water it down a lot, otherwise it will probably just come back up as well. For one so little all you can do is push fluids as much as you can and take him in for some fluids if you simply cannot get him to take them by mouth. As far as dehydration goes, just follow your gut. Better to take him unnecessarily than to deal with the consequences of not taking him when he needed it. For the fever my dr always says I can alternate baby Tylenol and Motrin every three hours, to keep him comfortable. And hang in there, I know cleaning puke gets old! He will be OK just keep a really close watch on him.