boobs

i'm 17 years old, weigh about 125 and i'm about 5'5". i've played sports all my life and have always been pretty petite. i started my period at 13 and everything's been pretty normal but the one thing i'm worried about is that i wear a 34a bra... i love the shape and color of my boobs but the size is the one thing holding me back from being too intimate with anyone. what i really want to know is if i'm stuck with them being this size or if they'll still grow throughout college and later on. sorry for it being long it's just something i've been nervous of lately