I totally know what you're going through! I struggled with anorexia all through high school and at my worst I was 5'6 and weighed 90 pounds. After finally achieving a healthy body image, I gained back weight until I was 140 pounds. Now, I'm down to 125 doing Atkins and I still look in the mirror and think that I am even heavier than I was before I started! I thought maybe I was relapsing back into my eating disorder, but it's comforting to know that other people are experiencing it too. What helps me is to get out that pair of pants that were too small before you lost weight and keep trying them on and you can reassure yourself that you've lost all that weight by how much closer you can get to buttoning them! That's what helps me. That pair of pants is now too big for me!