Hi Bibiana,
I noticed you've repled to one of my posts, it was day seven of my first week yesterday and it was definately enough to keep me going when i got weighed (i didn't go near a set of scales all week which was so hard but sooo worh it when i found out my loss after all that waiting and knowing id stuck rigidly to the plan!)
Anyway if i'm anything to go by you can do it, i am your typical eat everything in sight kinda girl, my mum got the crimbo choccies out earlier but i didn't even feel tempted as if it's enough to knock my loss even slightly next week it's not going anywhere near my mouth!
My tips after one week would be plan ahead even just for the day, make sure you have your shakes in for those unprepared moments and only get weighed once a week!
Good luck xx