First try!

  I just tried my small lunnete for the first time today! Mostly it went great so far no leaks and getting it in and out was not a problem but for some reason when its in I get cramps whhich i dont usualy get when im on my period also the stem is completely poking out and today (first day of period) i can barely reach my cervix with my finger. I would appreciate if anyone could tell me how to get the cup to sit higher (if that would help)? Another thing is that when its in it feels weirdly like i have to poop (it feels like this is what is causing the cramps)?  could these problems go away as i learn to use my cup?  any advice is appreciated!