I agree with Moe! Call the dr!
My son has had a fever this weekend. (First time for us ever so we called the dr probably sooner than most people would)
We were told to bring him in if his fever got higher than 103, or if it lasted for 72 hours.
I was worried about his fluid intake, but our Dr said to bring him in if he went 8 to 10 hours with out a wet diaper! (To me this seems like so LONG)
But luckily, he's eating fine!
Hope your little one is feeling better soon. I know it's not fun at all!