I am 13, about 5'2" and am of average skinniness. I have never tried cups before, but am very comfortable with putting in tampons and just generally with my body. My mom uses cups so I am used to the idea, but she used diva cups which I am afraid will be too big. From what I've looked at the ladycup would be the smallest, but the lunette small and mooncup uk small have gotten better reviews. Any suggestions?