Hi, I'm 19 years old and I'm very worried about the sizes of my breast, how they differ. I've noticed a little bit of pain in my right breast, somewhat on the side or a little bit high by my armpits. It happened before but lasted maybe a week or less which was probably months ago or longer, but now again for the past 3 days I've noticed the samething except I see now how my right breast is bigger than the other. My left breast isn't giving me any problems though. Like what can be the problem? I'm not sexually active either, but my period is very rare. Is this normal at all?