Does this sound like hocd

Im a 17 yr old girl and for the past year well actually i think longer than that i have been worrying if im gay. Last year when it got real bad i couldnt eat i barely slept i feared i would have a gay dream which i have had since i have had this. When i was five i got my firt crush it was on a little boy on my teeball team and since had many crushes including one in first grade where i convinced myself i was in love with a boy. When i was 12 is when i think this began but i got over it alittle and then last year it was crippling but anyways when i was 12 my friend told me this girl in our pe class was gay and i thought she was hinting that i was and i went home to my mom crying and kept having her reassure me i wasnt but that summer there was this little girl i thought was so cool and wanted to be just like her and be her friend and i remember my parents watching a rated r movie and i walked in and it had this lady stripping on the screen and a month later i pictured that little girl doing that but ever since i have had guy crushes i just feel no one likes me and the other day i had this fantasy about me and this guy doing it and i was really aroused but i was worried i wouldnt feel like that in real life and i worry that maybe lesbians have these fantasies but ever since this hocd i have lost my attraction to guys its like i cant concentrate on anything and when i was 7 i did it with this little boy and loved it but now im starting to wonder if all my crushes where false i keep telling myself i forced myself to like those guys and im so scared i cant keep doing this i am going to go crazy. I have drifted from my friends and family im always mad and thinking its like i cant stop thinking and how do itell my mom if i do have hocd. Im scared i used to worry i was dying of cancer or heart diseas and spend every waking hour searching for symptoms and diseases help me please