Stupid self control...

UUUGGGGHHH!!!! I hate that I have absolutely no self control! This past month I've been trying to do better at being healthy-eating better, going to the gym, etc. For a while I was doing really well and I even lost 5 pounds. This past week though...it's been tough...I don't know what's so different about this past week...it seems the same as every other week...but I find myself falling back into my old habits of over eating and staying up way too late. Then, of course I have no energy the next day and I feel like crap! Not to mention the 2 pounds I gained back... Obviously it's not a matter of not knowing what's best for me, because I do. I just choose not to do it. Why do I do that?! It makes absolutely no sense! It goes against everything I'm working for right now! I hear myself in my head as I reach for those pringles..."why am I eating this? I'm not hungry...I really shouldn't eat this..." and yet, I do! Why?! Why can't I just do what I know is best? Honestly, I think the worst part is that I don't feel better when I do this to myself. I feel great when I'm healthy and I have a good workout, and I feel good about myself! But when I loose my self-control, it makes it worse, not better! I feel worse! And not just mentally, I feel physically....uh...well, blah. ugh...I guess I just need to suck it up and do my best. Maybe since I have now admitted my weakness I'll be less apt to do it again :) one can hope right?