I worried about this too once I started using the Nuvoring. I'm on my second one and I've had no problems with it coming out. I never know it's there. When inserting it I simply pushed the botton of the ring as far as my finger would extend. Once it's in place I can feel it's positioned right. My suggestion is to not be uncomfortable with your body and go with the curve of your body.
it took about a month for me to notice drastic side effects
nuva ring dosent intercourse coming out kinda my best friend nuvoring botton i can feel curve suggestion