I'm 34 & have two kids, one vag birth & one c-section.
I think I got the insertion stuff down with the Diva Cup, to the point where I don't even feel it. But as soon as I start moving around, I feel the cup start to slide and it comes about halfway out. I'm talking within the first few steps I take after insertion. I believe it is sealed, as it doesn't want to spin and won't push up any more once it has popped open, and I still have to break the seal to remove it.
I have completely trimmed off the stem because it was poking me to death, so that part is better now, but what the heck can be going on? Is this a muscular issue maybe?
I've messed around with it so much tonight that I'm sore, so finally just went to a pad to give myself & the vajajay a rest! :P