Hi,I'm 16 and I'm interested in using a mensrual cup. I watched a video online about them and it said to check your cervix.if your cervix is high get a cup for a high cervix if your cervix is low get a cup for a low cervix and mine is low. I thought your cervix moves when you are on your period. I don't want to get a mensrual cup for a low cervix then when I am on my period it goes up to far because my cervix has moved. What cup should I get ?