Well, I got my period yesterday, so I decided to put my Lunette Selene (small) to the test. I wore it fine for awhile and emptied and reinserted before bed. I am so glad I wore backup last night because I woke up at 4am and it was leaking! It had only been about 6 hours or so. It was about maybe halfway to 3/4 of the way full or so. I normally can get away with leaving my small OrangeCup in for 8-9 hours. I don't know why it leaked...maybe it lost suction or something? I was hoping you all would be able to give me some ideas as to why this might have happened. I wore it to school today and around 1pm, I felt it kind of leaking a little, so I just reajusted it and it stopped. It's my first period using my Selene, so maybe that has something to do with it. Should I just use my OrangeCup tonight so I don't worry as much? Anyway, thanks so much for all of your help!