From feeling that I'm for sure straight to not knowing now if I'm bisexual. Please asnwer please asap please?

So to image being or cute and romantic with a girl seems kinda or pretty much weird to me. All I do and and only do is crush over guys and imagine being having sex with them, I listed to music and daydream that I'm this girl that as close to perfect and all the guys or most guys think I'm beautiful and my crush can't take his eye off of me. The only thing is this is the second time that I'm late on my period very horny and and have found myself watching more lesbian porn, I always do but this time is much more often. The only reason is because I would think about sex with my crush so much that I would get horny and turn to porn and watch lesbian porn to try to forget. To cool off. But now it's turning me on and I'm questioning myself if I would ever have sex or try it out with a girl. But to think in reality seems a little weird to me to go that far and have sex with a girl. I use to imagine having sex with a girl when I was much younger but not anymore really, I was sexually assault by a family member that was a lady and I use to push for it and I enjoyed touching the boobs and dry humping but afterwards I felt horrible and gross. Not only because it was family member but also because it was the same sex. I've never had sex but all I want in life is to find a guy that's wonderful and have a forever love.

Maybe I feel this way because sometimes I feel funny thinking about a guy seeing me naked? Is it maybe my hormones because I need to get my period (I'm late). I'm 17