Is she a she or a he?

Idk im kinda lost about all this. I been talkin to this girl for a while and she never told me until a few days ago that she's not really a girl. She didn't go into it but I kinda already knew that cuz he best friend had told me. I didn't believe her when I heard I thought it was a stupid rumor goin around or w.e. but I guess its true. I asked her what does she feel like more. She said she feels like a woman rather than a man. So which one is she? I never met her in person iv only been talkin to her over the phone the past few months I feel kinda miss lead and stab in the back for some reason.