My weight has fluctuated between about 8.5 stone and a little over 13. When I was at my thinnest - probably underweight given that I'm 5'8" and big boned - I had plenty of days when I felt so fat I didn't want to leave the house. All because I got a slight crease in my belly when I sat down. Photos of me at the time look almost skeletal but I still felt fat. That's pretty screwed up.