Coming Out...Again?

For my entire 16 years of life I have identified as a cis-gendered female. That was the norm and that’s what I had been taught. But as I’ve grown and gotten older I have never been comfortable with my gender identity. I don’t know what to do anymore. My preferred pronouns would be all. Her/Him/Them would make me extremely happy and way more comfortable. I have so many friends in the LGBTQ community and I’m already out as bisexual. So why is it so hard to come to term with my gender identity. Should I come out or should I just think about it more? I honestly have no idea what to do.