Needing some quick help here!! I've got a femmecup lite which I've had for a year, but just recently it's started to slip making sitting down very uncomfortable!! Standing up, however, is fine. Is it worth getting the larger mooncup? (For information - I'm 26 on Sunday and have had two vaginal births) It's a big sum of money for me to spend for anything that might have the same problem! Anyone have any advice??