What the hell is going on with my sexuality?

Ever since i was young (11 or 12) iv jerked off to girls and women. Iv had fantasies about countless women and girls and had a massive crush on one for about 1 and a half years. As the years have progressed iv started jerking off more and more till the average was probably 2wice to 3 times a day and i found about 3 months ago that it was getting harder for me to get off to porn and then one day a few weeks ago i thought about a dick and wham i got off in like a minute (granted i had already been jerking off for about 3). The penis was however the only thing that turned me on, mens bodies and especially their faces turn me off. After this i freaked out and went into depression and started getting anxiety attacks. Theyv gotten better over the last week and i assume its from forgetting about it and being with my friends, its weird cause in movies sometimes i still get insaneley turned on by women (which doesn't happen with men) and at school i never really feel sexual attactions towards men, but it still really freaks me out because iv also been not as attracted to breasts for the last month which half a year ago would make me drool. Im 16 and a half and have never had a relationship with a girl or a guy and only once made out and touched a girl which from what i can remember i really enjoyed it. It seems the more i freak out about this the less i seem attracted to girls. Also online i read a homosexual writing and it kinda turned me on but im not sure what im turned on by, i remember when i discovered milf porn i was insanely attracted to it for awhile and the same thing happened with asian and a bunch of other porn styles. Like i said however i never get the urge in school to suck a guy off and i still really only flirt with girls but they just dont seem to be getting me off the way they used to, especially in porn.