help

I'm trying my Diva cup for the first time and well, it's stuck. I'm pretty tall and this thing has managed to make its way SO FAR UP my vaginal canal that I can stick half a finger in myself before I feel it. When I inserted it, I left the stem sticking out a little bit. I've been trying for 30 minutes to pluck this thing out with a pair of tweezers but so far, no luck. The instructions say not to panic, but well, there's a piece of silicone stuck in my who-ha and I want it out. Someone please tell me what to do.