Well, yesterday was the first day of my cycle and my Lunette kept losing suction! It was very frustrating and annoying - if I just moved wrong or even farted I'd feel it gush. I am positive it was inserted correctly in the first place because I kept checking it over & over, and I'm able to feel to the rim all the way around to make sure my cervix is in the center.
So, I decided to see if I would have better luck with the Diva and VOILA - no more leaking. I have no idea why my body suddenly decided that the Diva fits better this month, but I'm quite relieved that I had a back-up! I'm considering purchasing yet another brand just to have a third back-up!