Stutter turned into Blocks

Stutter turned into Blocks I used to stutter, like repeating sounds until i could say the word. Now I can't do that. Instead my body tightens up, my mouth tightens, I can't breathe. I'm standing there with a lot of tension until I can push out the word. And it happens between every single word. I've never been able to have a conversation with anybody, and I have no friends for that reason. All I can do is reply with basic phrases I don't know why I block. Even when I am reading to myself I will get stuck on every 1-2 words. So it has nothing to do with anxiety