Hey! I guess you started the day I was supposed to start! Good job!
As far as teeth go, I use the Melaleuca toothpaste and mouthwash which is all natural. I have had no adverse cravings or anything as a result. It's Sugar free and alcohol free too, not too mention a really good product (I go out of my way to spend more for it).
As far as cravings go--I think that I too am overdoing it with the scale (even though that's not the main reason why I'm fasting). I think that has a strong effect on my cravings but the media is flooded with images of food. I too found myself craving stuff I never even thought to eat. Everything looks good! I want to stop weighing in and punishing myself with thoughts of my post fast menu, but I can't help it!
As far as the mood swings--yes! I started crying in front of my boyfriend for no reason. Of course, that could have been PMS. So I don't know for sure.