If you're craving carbs on day three, something has gone wrong somewhere. Around the third or fourth day is when your body should have adjusted, and the only way to describe that feeling is that it's mildly euphoric. It's ace!
I think the eggs have something to do with it. As others have said, variety is important in a diet. Not necessarily for health, but for psychological reasons.
There are so many thousands of great things you can do with food on Atkins. If you're having trouble eating a lot of vegetables, then add some mayonnaise to salads.