I read your story with tears in my eyes. It is so familiar... the lost sleep and fearful nights, worrying my daughter would find me dead, turning to food for comfort. First, let me say that you look so beautiful! You really do! You are just glowing with happiness in your tiara picture! Second, let me say that I cannot count the times that I've been in a positive, happy, successful place with a fitness regimen only to be taken down by my extremely rare and debilitating autoimmune disease. This is what I know from that: It's frustrating. It's sad. It's demoralizing. It's painful. And it's temporary. Whatever this is, whether it lasts for a week or 6 months, you WILL get past it, and when you do, you'll feel just as good when you get back out there again. Maybe your weight loss will slow a bit, but it is not dependent on your walking. I need to have both my knees replaced, and all I can do is swim. There are also chair aerobics and boxing DVDs. Feel a little sorry for yourself for a day or two. You deserve to. But know that you will get past this. In a matter of time, all will be well.