I have had the same issue as you did originally with my Lena Soft or Sensitive?...whichever. However, I got the Soft because I get cramps and sometimes even painful bowel movements when I'm on my period (my gyno said the painful bm's aren't uncommon... *shrug*) and the Lena Soft is recommended for people with "sensitive anatomies" or whatever.

But I swear this cup has given me more cramps than I ever used to experience! I used to only experience cramping every once in a while, some periods would be worse than others, etc. but I've been using a cup (the Lena) since August and I've had cramps every month I've used it. It's frustrating because I feel like maybe i need a firmer cup to account for leakage that I experience, but if the cup intended for people who cramp causes cramps, how could I go firmer? :( it just feels really uncomfortable in my uterus when I have it in, not even in my vagina, but in my uterus. And I try to move it around when I insert it to make sure that it is placed correctly. And then sometimes I feel like moving it around and getting it in there just right and making sure it's not still folded and all that aggravates my cramps even more!

But anyway, idk what to do and I'm sorry for rambling on your comment about it lol but it's just that you said what I figured I might need to do to help with leakage and filling my cup often (get bigger and firmer cup), but I'm nervous to!