LGBT, do i hav a gay obsession!!?????!?

basically im obsessed with the fact i could be gay!!! over the past few months i hav been questioning my uality and its almost driven me to suicide, not because i dont wana be gay but because my mind wont rest, it is thee first thing i think about in the mornin and i hate goin threw with each day!!! i hav never doubted i was hetero in my life so why am i now!!! i have kissed my girlfriends over the past years and like kissing girls, i watch strait also and when i masturbate i think of girls i no like ex gfs and stuff, i tried out gay for the first time today and it didnt arouse me and i no boys usually doubt their uality if they do get but i dont no whats wrong wif me!! im so depressed im on anxiety pills but they arnet working too, and my bestfriend is called martin and i have been friends wif him all my life now i look at him in a ual way cause im obsessing, i get gay thoughts allt he time but im yet to be by them, i also get thoughts about having with family members and pets i know its so sick but i am messed up!!, I have always been a big worrier like 2012 and i thought i had cancer and couldnt settle my mind all summer, when i step out in public i get severe anxiety and look at all men in a ual way, doesnt matter what age they are it just comes when i look at them, and i feel as though im losing attarction to girls in reality even though i watch them all the time on the internet please whats wrong!!!??? im 16 btw