I've been on the NuvaRing for about a year now, with no side effects. I switched from the pill because all of my hair fell out, so I switched to the ring. However, for the last 2 months, I've had SEVERE BACK PAIN which has almost caused me to be bed ridden. It feels like my spinal cord, by my tail bone, is curling under. It hurts to laugh, cough, walk, you name it. For anyone else experiencing this, you're not alone.