Diva Cup trouble

I just got a diva cup and im having a really hard time geting it in... any advice out there? 
I've tryed lots of different folds, positions, in the shower, bath, squatting, etc., but it just stings right when it's about to open up. Should I just wait until my flow is heavier? I don't know what to do, and I don't want to go back to tampons!!! Thank you!