I hate it when people touch my neck. Am I crazy or is this a phobia?

I absolutely hate it. When my neck is exposed, it annoys me because i can FEEL the air particles touching my neck and when I laugh really hard, my hands automatically cover my neck, as if someone is going to strangle me, even if I'm watching a movie alone and i laugh, i still cover it. I can touch it myself, but when other people even move their hands in the direction my my neck, i cover it and slap their hand away. just the thought of people touching it makes me cringe and cover my neck.

Is there something wrong with me?