Female Sex addict normal?

I am an 18 year old female and I cant stop thinking about sex. I have heard of men being this way but not so much woman. Now i can restrain myself and I have high morals so I dont sleep with some one until there is some form of committment (just how I was raised) But I find its getting harder and harder to resist. My libedo is out of controle. Also I was told that it is unusual that  I can control my pelvic muscle to tighten and loosen my entry vs. only having it do it in times of pleasure or discontent. Is this true?