I am 5'3 have a very large chest for my age, naturally curvy and weigh just under 10stone how over weight am i?

Normal BMI. Height of 63" and weight of 10 stone (=140 lbs) produces a body mass index of 24.8, which is within the normal weight range. Continue to exercise, eat healthily (fruits, veggies, good fats, moderate protein, whole grains, plenty of fluids).