Im confused about this... help?

Ok so I'm female..... But I think like a guy sometimes..... And I'm not just talking about being a tom boy or any thing....like this one time there was an small emergency at my house out side my dad and brothers went out side to take care of it I tried to go too and my dad said no. And I thought to my self " I hate being stuck in here like a girl!" When I am a girl!!!!! This has happened on many different occasions..... What does this mean? Was I supposed to be a guy? Also I'm a twin I had a twin brother who was killed its said that when a twin dies the one that lives sort of lives the dead twins life for them in like some of the actions, talents, thoughts or feelings the dead twin would have had....do you think this is true? Do you think that could have ant thing to do with these odd thoughts my brother being a guy and all? Btw I'm attracted to guys so being a girl I'm straight so my odd guy thoughts only go so far ....lol but its weird its like I can see situations from both a guys and a girls stand point. My guy friends say I'm cool cause I get the way they think most of the time but I still see things from my own gir point of view too....it weird. Sorry this was long what do you think? I'm confused.