First Cup - Problems?

I just ordered the small Meluna cup with a ring handle (it said that was best for beginners). I might not use it as soon as i get it, but I need to know - has anyone had any problems where their cup sucks into their cervix? Like, the cervix is too large for the small cup and it just - zoops! - it inside? (I know it's happened before, I just want {or don't want lol} to hear a personal experience). This is really my only concern for using a cup. I'm not very good with things in my vag (I'm 14, no OBGYN and not much body experience), and am a little nervous about taking it out, but I know I can figure that part out as long as it doesn't vacuum inside my cervix lol. Anything will help :)