Hun, you're not fat. And it's not healthy to obsess about your weight. It will turn into an eating disorder which isnot fun at all. If it isreally concerning you,go to your doctor and ask him what he thinks. If you want to make sure you won't gain weight, then try eating really healthy things and workout on a regular basis. You will feel goodand look great by doing that. Please try not too worry about it though. You are not fat.
And SHAME on those who are mocking you. This is a support forum, not a place to bash people. You have come to the wrong place if you feel the need to bash others. These forum's do not seem to be moderated very well.