What does it mean if I hav had a dream where I am a guy?

I am a 14 year old straight girl and I have had four dreams where I am a guy. Once I was Iron Man, another I was a transsexual, then I was dating Anne Hathaway and the last one I was gay. I don't mind the dreasm I was just wondering what it means and if any one else has ever had a dream like this.