I think everyone wakes up every now and again and feels 'fat'. There probably is some chemistry which causes that feeling but it could be psychological - at the end of the day you shed loads of fat on LT and if you stick to it then I think its impossible not to lose weight. So if you can, focus on giving LT a chance (at least a month) and when you see those dramatic results you'll dismiss pretty quickly any feelings of being fat.
PS: You have a wonderful figure in that pic!