Am i normal?!?!?!

ok, this is going to sound weird coming from some one my age but.....I have a fear of sex. when ever my friends want to talk about how good this one guy is or how bad another is I just either tone them out or make an excuse to leave the room, when I think about me having sex I freak and hide in my bath room for hours, it does not gross me out I just.....well it just plain scares me...one time I got curious and masturbated but after that I tried to stand up and ……well fainted.. it was only for a second but I fell back on my bed and I did not like the fact I could not controlle my own body….is this fear normal?