What kind of stutter is this?

What kind of stutter is this? I heard about three types of stutter, but I'm not sure any of those are like mine. I have a perfectly thought out sentence in my mind, begin to say it, and then i say all the words wrong (wrong pronunciation and order), stutter (prolongation) halfway, and it won't go away if i don't yell FUUUUCK and quickly spit the sentence out just as i had it in my mind. Wtf is this