I've been using my Diva (small) and old school Lunette (one size) for four years now. They both worked great, with the Diva being my main cup but lately, I've been leaking a lot with Diva and Lunette. I just got a large Meluna in the mail and leaked even more with that one! No pregnancies in those four years and I was a non-virgin when I started using cups.
So, what gives? Should I buy a larger cup? Try a different brand?