I feel you.....lately it's been real hard to resist, don't know why. I usually do really good during the work week, eat very low carb and feel great. But then, on the weekends, we go grocery shopping and there doesn't seem to be much restraint to just grab something "forbidden" arghhhhh....(that I KNOW makes me feel achy, depressed etc afterwards). I was doing very good last year. For 8 months I never exceeded 20 carbs a day and it was easy. Weight loss was slow but I have health problems (I expected it). Still, it made me feel better. I hope that I can get back to that soon. In the meantime I do my best and forgive myself for it and try to get right back with it the next day. At least I'm not totally off the wagon. The only problem is maintaining ketosis right now....
Good luck!