I have been using a mooncup for about a year now but still having some problems.
At the start of AF, I have no problems but on day 3 the troubles begin, it feels tighter down there and I have trouble getting it in, then when I do manage to get it in, it doesn't pop out. If I put my finger up I can feel it pushed in on the sides by my insides iyswim, like it's being squashed. Then the leakages start because I'm not catching it all.
I have got the correct size as I'm over 30 and have had a vaginal delivery.
What can I do, if anything to resolve this?