I just got my first DivaCup in the mail, and I'm having some trouble. I looked through the memories that seemed pertinent, but I've tried almost everything in them, so I hope it's okay to just post some questions. I'm able to get it in, and it pops open and works without leaking, but it's really uncomfortable. I've cut the stem as far as I possibly can, and that hasn't helped. I'm not sure if it's popping open too early or what. I've been trying for two days now and it's getting a bit discouraging. Can anyone give me any tips?