I love my Mooncup UK (size B), but I have a slightly annoying issue with it. Normally my cup sits nice and low and easy to get at in my vagina, but without fail when I sleep it scoots up to sit right by my cervix, which makes it difficult to reach. Sometimes I get leaks first thing in the morning and I suspect it's the fact that the Mooncup has repositioned itself that causes that to happen, along with the fact that my flow is much heavier first thing in the morning than later in the day. (It doesn't leak while I'm actually sleeping - only when I get out of bed).
Why does it move? I've noticed it does the same upwards motion if I orgasm while wearing it (although it generally doesn't leak), but I'm certainly not aware of climaxing while I'm sleeping. My dreams are usually fairly bland and not particularly sexy. Am I having much more exciting nights than I realize??
Anyone have any words of wisdom on this issue? I'm fairly sure I'm inserting the cup right before I go to bed (I insert it the way I usually do, which never leads to leaks during the day). Why is my body sabotaging my good positioning?