Hit a brick wall

[Crimbodrama]

I had a very successful weight loss with slimming world, lost 3 stones between January and August of this year. Then following a combination of birthdays and other events, I had 6 weeks off and then stopped going to class.. since then I've just hit a total brick wall. I've tried doing it myself (not going to classes or going online) but just appear to be cheating myself, I end up doing 1 or 2 days then I just ruin it with a take away. Desperately want to lose a stone before Xmas, I feel my relationship with food isn't healthy and that probably needs to be addressed first of all. Out of the 3 stone I lost, I've put on half a stone and want to get back to what I was before but just finding it so hard. I had my normal breakfast and lunch today that I would have ordinarily had on SW but it is TOTM and I just wasn't feeling it and craved chocolate and then went into the staff canteen and bought a boost bar, packet of crisps and slice of banoffee pie. Now I feel sick with msyelf.
Just wondering how I break this cycle, part of it is being so bored of the food you eat on SW also.

You're doing so well! Just think you have still lost 2 and a half stone and that's brilliant.

Do you think it would help if you bit the bullet and started going back to a physical class? The only way I can not lie to myself is if I have to be accountable to someone else.

Is a stone before Christmas realistic? I say that as someone who rarely loses more than a pound a week! I agree with @delilabell that going back to class might help. Failing that go back to basics, read the books you get when you join and start anew. There is a fairly busy sw support thread on here you could join and also one to list your daily meals, might make you more accountable?