This happens to me a lot and i was just talking about this to a good friend of mine. I stutter very often - Mildly most times but it gets severe every 3 to 4 weeks. The intense stuttering lasts about a couple of weeks - This is when i feel tightness in my throat.Its almost as if someone is trying choke me. I would feel physical discomfort in my throat and my tongue suddenly feels thick and looses flexibility, (atleast that is what it feels like) .