Okay ladies so I’m using my diva cup for the first time and I can’t get it to work. It keeps leaking!

I’ve done hours of research, I’ve changed my positioning, I’ve done everything I can do to make this thing go in properly and it still leaks! Should a buy a smaller cup? I’ve given birth to 2 kids, and I have a heavier flow so I bought the diva cup number 2. It just seems like it doesn’t have enough space to expand properly, but I don’t know for sure.

Please help a girl out!!