Your as SO not alone! This is day 3 for me. I'm doing ok, so far no slips at all. But I've been here before and it is usually the scale that defeats me...or causes me to defeat myself.
Just know that you are not alone in the struggle, and I'll try and remember that too.
We can succeed and there are so many people using this site who are an inspiration and have been successful.
Good luck, hang in there, maybe scared is good, maybe there is something else, depressed for instance that is the real trigger to failure.