Part of this process is breaking habits and sometimes you do just go into automatic, especially at first.
You can now choose whether to make this into a big drama that could knock you off lipotrim, or you can forgive yourself, set your mind to being more careful for a while, and move on. It is up to you, but being angry and upset about it isn't going to undo what you have done.
I would also like to point out that you haven't just murdered or robbed somebody, you have absent mindedly eaten a bit of Yorkshire pud! Don't want to sound mean, I do feel for you, but you really do need to remain calm. You have lost 10lbs and it hasn't gone back on again because of this slip x