I use the Nuva Ring, which is a rubber ring like a jelly bracelet that you insert in your vagina and leave it in for three weeks, then remove for a week when you'll have your period. (very convienient for people who forget to take the pill, actually) I seem to feel like my chest hurts when I first insert the ring (when the hormones are strongest) and i feel jittery. Anyone else associate? By the way, thank you so much for all the replys to my first message...what a relief to know that im not ALONE!!!