I am using a MeLuna soft small, and I've been using it for the past five days. During the first two days, I had absolutely no problems with it (it was like there was no learning curve at all), but by the third day it started leaking. It's never full when I remove it, though--I'm on birth control and my periods are very, very light.
I am sure it forms a seal because I feel it pop open and I twist it around and stuff, but it still leaks. Thing is, before it starts to leak, I feel something like an air bubble (actually it's more like a queef of sorts). A few minutes after that popping feeling, I would get spots on my underwear. I've been wearing a liner as backup for now.
TL;DR: is it possible for the seal of my cup to break inside of me, causing leaks? Could this be a size issue? A placement issue? A cervix issue??? Am I queefing my cup out of place?????
More about me: I'm 25, sexually active, never had a kid. 166 cm and 53 kg so I'm on the smaller side, but I'm also terribly unfit. I got a soft MeLuna because my urologist said I have a hyperactive bladder and a stiff cup may cause me to pee even more. I also have a retroverted uterus and I have no idea if that affects anything. Cervix is pretty much regular height, doesn't sit low or go up too high--I can feel it well but my entire middle finger has to be in.