I'm in my 5th week now, and I do also remember feeling a bit 'sicky' and 'headachey' around Day 7. Have you tried licking some sea salt and taking some extra water? That generally helped me with headaches, or that slightly woozy feeling we sometimes get. As to the hunger - have you been eating anything with aspartame in it? Many here think it stimulates hunger, and I tend to agree.
I invite you to visit my blog at http://diettalktoday.com
It's focus is on helping those who chose to use alternative products.