It's very hard. I have been on all different site, diet many times. As I said at the beginning. I always lost about 10 pounds and give up. But this year I found this forum, it's extremly motivate me. I spent a lot of time to read very thing everyone said which help me a lot.
You have your hard time right now. I wish I have a fomula or a magic whip to get you back on track.
Just take a few days, clear your head and begin your new journey. It's harder done than said but you've done it before and you can do it all over again.
You are welcome to use this thread for your journal. Put it all out there to keep you accountable.