I'm 15 and I feel like I have a 12 year old body. My bra size si 36 b but i feel like im an a cup

im only 5'1 feet but everyone on my dads side of the family is really tall
my cousin is 6'3 and his mom is only 5'0 and his dad is 5'7
my mom side of family is average height but my mom is also 36 b cup

i feel really short
i hate wearing heels
am i a late bloomer? when will i grow?