Well sometimes my muscles will twitch/vibrate and it's really freaking annoying. Pressing your hand against the vibrating area should calm it down. I've never had it last that long through!

OMG this is happening to me too! I have been looking on the internet to find out any information that I can and here is where I ended up. For me the vibrating started about two days ago as well (Tuesday). I also inserted my Nueva ring in on this Tuesday morning. This has not happened before with my Nueva ring but maybe I just never noticed. At first I thought my phone was vibrating in my bag and that I was feeling that. However every time I picked up my phone no one had was calling and the vibrating continued.

I agree it is so annoying! The pattern is in intervals of vibrations but when I touch down there I can't feel any external vibrating so I know it has to be internal. My guess is that it may be some sort of hormonal thing. I really wish I had a better explanation for it. If anyone out there can help us please do so.