Go back and start over again. Beating yourself up doesn't help. Figure out a way that helps you resist cravings. I tell myself that I don't eat poison (which is what high carb foods are for me) and that I am not my cravings. Instead of giving in to them I just watch them arise and then watch them dissipate, which they will do if you just don't give them any energy. It's definitely harder when your home is filled with junk food but it can be done. Giving in to a craving does not make you a bad person but if you want to follow a low carb diet you have to find a way to resist the cravings. There are temptations all around. Observe your triggers and figure out what you need to do to get beyond them.

I notice that you have not read any books and you don't follow a specific plan. It will really help you to do some reading and follow a plan. A good place to start is dietdoctor.com

Jean