One Year Anniversary

Well, a year ago I saw some pictures of me that were taken at our fourth of July celebration.  I though OH my how is that me? Well ever since then I have been VERY VERY focused on South Beach and becoming a healthier person.  I have lost 50 pounds and went from a tight 14 to a loose 8. We went on vacation in June and I have had the hardest time getting back on track. I never "cheated". Just did some overeating.  How can I get myself motivated? I feel like I have gained 10 pounds, I am too scared to get on the scale.  I eat all phase 2 foods...just too many of them.  Please someone out there help! I don't want to ever be fat again! I still have about twenty pounds to lose, so the climb to the top is not over.