Ok so this may be a bit TMI but I have to see if anyone else has experienced this.  For last few days I've had this strange pulsating/throbbing/vibrating feeling in my vagina. I've never had this before. It lasts for several minutes at a time, goes away, and then starts again. I've read a few things online about people having a similar feeling but no real clear answer as to what's causing it. Has anyone else had anything like this?!?! Should I be concerned?!???