Am I ed? Or is it just a phase? FTM?

I was raised in a Fundamentalist Christian household. When I was young, around 5 or 6, I never really thought about gender or gender identity. I was a girl. That's all I knew, and all I thought. I had moments where I would try on my brother's clothes or put on a hat or wrap my hair up, and I would study myself, never really sure of what I was doing. I would follow the other boys around, and consequently was teased by people who thought I liked them. At 10 years old, I was devastated that I finally got my menstrual period-- the last thing to prove to me that I was in fact a girl. In my early years, if I did maintain a trans gender identity, it was very subtle, and probably so subtle I couldn't even grasp it. I was raised to think I was a girl, and so I did- at least partially. I managed to find out about FTMs from a Degri episode about Adam. And so I began to wear male clothing, ace bandages, etc. I am still not sure if I am just trying to emulate this or if I managed to identify something I had been dealing with for a while. I am a teenager now, and the thing that sucks is that this came up while I was a teen- the same time I found that there are people who live their lives as members of the "opposite" . I don't know if this change came from hormones, meaning it would be a phase, or, information, meaning I was ed all along, but I didn't know how to identify it. Can someone give me an answer? Please notify me if anyone has had a similar experience.