What you did with your "cheat," and it wasn't a small one, by lc standards, is start up the fat making machinery again.
Dr. Atkin's explains that when you eat more carbs than your body needs, the pancreas secretes insulin that turns the carbs into fat. This also makes you hungry, so you want to eat more. If you eat more carbs, you are just starting the merry-go-round again.
It's way too early for you to start experimenting. You want your body to stay on the fat burning mechanism. By eating refined carbs, you tell your body to switch to the carb-burning, excess carbs go to storage mechanism. Which is bad for you!
Did you add up the carbs you ate during your cheat? I'd ballpark it at around 50 carbs, all unrefined stuff that rushes into your bloodstream.
Bad news.