Im 53 kg, 13 yrs/4 months & 5'2 (157 cm). I'm nearly overweight, what should I do?

You shouldn't be too worried about this just yet as you're still growing, but if you're really concern. Ask for your doctor's opinion and then do what he/she says. If you're "nearly overweight" and not "severely overweight" then there shouldn't be a reason to think about it too much.