Im 12 and I feel fat . I weigh 7 stone and I am about 5ft.

Do I need to lose weight ?

You are only 98 pounds. At 12 years old that is not fat at all. Actually that is pretty close to perfect according to your height.

Also it is normal and healthy to put on weight (which you clearly havn't) before and around puberty. It's your bodies way of stocking up for a growth spurt and all the changes that occur.

You are more than your body judge yourself on your achievements not your appearance.