The reason that your diet isn't working and that you have put on 3lbs this week is that you have been out 3 times this week. Once to a chinese buffet where you quaffed several vodka and tonics as they were 2 for 1. Once to pizza hut where you had a large stuffed crust, extra cheese pizza to yourself plus beer and wine and then to an Indian place where you had 2 starters, Korma for a main course, pilau rice plus a large naan and icecream and more vodka.
You say that you want to lose 7 stone in 7 weeks (unlikely in the extreme) but you are blaming the diet plan for your failure and not taking responsibility yourself. If you want to keep your binging to yourself, don't post it all over facebook and then whinge like anything to the support group as, quite frankly, we are getting sick of you.