I recently just bought a diva cup in hopes of being able to use it for my next period coming up. I’ve seen women try to use it a few days before just to get the hang of it so i tried it. It’s not going in correctly. I tried a few times and with different folds too. At last it finally went in but the cup just felt to low. The nub was sticking out so i pushed it in a bit but it still felt to low. How do I know how high to put it? Is the nub not supposed to be sticking out at all? Please help. Thanks :))