Vaginal twitching!

So I have been experiencing vaginal twitching and it goes on throughout the day and it's a little annoying. Some of my friends say it's normal every now and then. My cousin also experienced it and says it happens to her when she's sexually frustrated, which I currently am. I just wanted to see if you guys are experiencing the same thing and it would be good to have support because it is a very weird thing to talk about. If any of you have any advice I would appreciate it and I know I am not alone in this. Where are my fello twitchers?!