How many calories should an 11 year have a day?

I just turned 11 2 days ago I started my period early january and i'm a cup size 32 A full I weigh 86 pounds and I'm 4, 11. I just started lacrosse and at recess i usually play man hunt and when i come home at 2:35 i'm outside till 5:30 dancing ballet, stretching, climbing a tree, throwi