Nothing is wrong with you. I blame biology for this reaction to situations. Well, maybe thats why i dont get better... just find other thing to do in those moments. Pull you hair, or bite yourself... (not too hard, just enough to bring your head back), read, or analyze how stupid it is to almost make your stomach break apart!!
Of course.. its easier to say it. Real action takes bravery, do it dude!! We are behind you.